diff --git a/dll/dll/steam_ugc.h b/dll/dll/steam_ugc.h
index 980c0b48..e6fd4084 100644
--- a/dll/dll/steam_ugc.h
+++ b/dll/dll/steam_ugc.h
@@ -54,6 +54,13 @@ public ISteamUGC017,
 public ISteamUGC018,
 public ISteamUGC
 {
+public:
+    enum class IUgcItfVersion : unsigned {
+        v018, // sdk 1.59
+        v020, // sdk 1.60
+    };
+
+private:
     constexpr static const char ugc_favorits_file[] = "favorites.txt";
 
     class Settings *settings{};
@@ -76,12 +83,15 @@ public ISteamUGC
 
     std::optional<std::vector<std::string>> get_query_ugc_tags(UGCQueryHandle_t handle, uint32 index);
 
-    void set_details(PublishedFileId_t id, SteamUGCDetails_t *pDetails);
+    void set_details(PublishedFileId_t id, SteamUGCDetails_t *pDetails, IUgcItfVersion ver);
 
     void read_ugc_favorites();
 
     bool write_ugc_favorites();
 
+    bool internal_GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails, IUgcItfVersion ver );
+    SteamAPICall_t internal_RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds, IUgcItfVersion ver );
+
 public:
     Steam_UGC(class Settings *settings, class Ugc_Remote_Storage_Bridge *ugc_bridge, class Local_Storage *local_storage, class SteamCallResults *callback_results, class SteamCallBacks *callbacks);
 
@@ -107,6 +117,8 @@ public:
 
     // Retrieve an individual result after receiving the callback for querying UGC
     bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails );
+    // before SDK v1.60
+    bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails );
 
     uint32 GetQueryUGCNumTags( UGCQueryHandle_t handle, uint32 index );
 
@@ -200,6 +212,8 @@ public:
 
     // DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
     SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds );
+    // before SDK v1.60
+    SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds );
 
     SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID );
 
diff --git a/dll/flat.cpp b/dll/flat.cpp
index 0c868533..6c1524b1 100644
--- a/dll/flat.cpp
+++ b/dll/flat.cpp
@@ -3675,14 +3675,7 @@ STEAMAPI_API SteamAPICall_t SteamAPI_ISteamUGC_SendQueryUGCRequest( ISteamUGC* s
 
 STEAMAPI_API steam_bool SteamAPI_ISteamUGC_GetQueryUGCResult( ISteamUGC* self, UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t * pDetails )
 {
-    long long client_vftable_distance = ((char *)self - (char*)get_steam_client()->steam_ugc);
-    long long server_vftable_distance = ((char *)self - (char*)get_steam_client()->steam_gameserver_ugc);
-    auto ptr = get_steam_client()->steam_gameserver_ugc;
-    if (client_vftable_distance >= 0 && (server_vftable_distance < 0 || client_vftable_distance < server_vftable_distance)) {
-        ptr = get_steam_client()->steam_ugc;
-    }
-
-    return (ptr)->GetQueryUGCResult(handle, index, pDetails);
+    return self->GetQueryUGCResult(handle, index, pDetails);
 }
 
 STEAMAPI_API uint32 SteamAPI_ISteamUGC_GetQueryUGCNumTags( ISteamUGC* self, UGCQueryHandle_t handle, uint32 index )
@@ -4143,14 +4136,7 @@ STEAMAPI_API steam_bool SteamAPI_ISteamUGC_AddRequiredKeyValueTag( ISteamUGC* se
 
 STEAMAPI_API SteamAPICall_t SteamAPI_ISteamUGC_RequestUGCDetails( ISteamUGC* self, PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds )
 {
-    long long client_vftable_distance = ((char *)self - (char*)get_steam_client()->steam_ugc);
-    long long server_vftable_distance = ((char *)self - (char*)get_steam_client()->steam_gameserver_ugc);
-    auto ptr = get_steam_client()->steam_gameserver_ugc;
-    if (client_vftable_distance >= 0 && (server_vftable_distance < 0 || client_vftable_distance < server_vftable_distance)) {
-        ptr = get_steam_client()->steam_ugc;
-    }
-
-    return (ptr)->RequestUGCDetails(nPublishedFileID, unMaxAgeSeconds);
+    return self->RequestUGCDetails(nPublishedFileID, unMaxAgeSeconds);
 }
 
 STEAMAPI_API SteamAPICall_t SteamAPI_ISteamUGC_CreateItem( ISteamUGC* self, AppId_t nConsumerAppId, EWorkshopFileType eFileType )
diff --git a/dll/settings.cpp b/dll/settings.cpp
index 03a16254..fbabef16 100644
--- a/dll/settings.cpp
+++ b/dll/settings.cpp
@@ -219,6 +219,7 @@ void Settings::addModDetails(PublishedFileId_t id, const Mod_entry &details)
         f->score = details.score;
         f->numChildren = details.numChildren;
         f->previewURL = details.previewURL;
+        f->total_files_sizes = details.total_files_sizes;
     }
 }
 
diff --git a/dll/steam_ugc.cpp b/dll/steam_ugc.cpp
index 682a033c..81dd8228 100644
--- a/dll/steam_ugc.cpp
+++ b/dll/steam_ugc.cpp
@@ -65,7 +65,7 @@ std::optional<std::vector<std::string>> Steam_UGC::get_query_ugc_tags(UGCQueryHa
 
 }
 
-void Steam_UGC::set_details(PublishedFileId_t id, SteamUGCDetails_t *pDetails)
+void Steam_UGC::set_details(PublishedFileId_t id, SteamUGCDetails_t *pDetails, IUgcItfVersion ver)
 {
     if (pDetails) {
         memset(pDetails, 0, sizeof(SteamUGCDetails_t));
@@ -106,8 +106,10 @@ void Steam_UGC::set_details(PublishedFileId_t id, SteamUGCDetails_t *pDetails)
             // TODO should we enable this?
             // pDetails->m_unNumChildren = mod.numChildren;
 
-            // TODO make sure the filesize is good
-            pDetails->m_ulTotalFilesSize = mod.total_files_sizes;
+            if (ver >= IUgcItfVersion::v020) {
+                // TODO make sure the filesize is good
+                pDetails->m_ulTotalFilesSize = mod.total_files_sizes;
+            }
         } else {
             PRINT_DEBUG("  mod isn't installed, returning failure");
             pDetails->m_eResult = k_EResultFail;
@@ -151,6 +153,63 @@ bool Steam_UGC::write_ugc_favorites()
     return (size_t)stored == file_data.size();
 }
 
+bool Steam_UGC::internal_GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails, IUgcItfVersion ver )
+{
+    PRINT_DEBUG("%llu [%u] %p <%u>", handle, index, pDetails, (unsigned)ver);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    // some apps (like appid 588650) ignore the return of this function, especially for builtin mods
+    if (pDetails) {
+        pDetails->m_nPublishedFileId = k_PublishedFileIdInvalid;
+        pDetails->m_eResult = k_EResultFail;
+        pDetails->m_bAcceptedForUse = false;
+        pDetails->m_hFile = k_UGCHandleInvalid;
+        pDetails->m_hPreviewFile = k_UGCHandleInvalid;
+        pDetails->m_unNumChildren = 0;
+    }
+
+    if (handle == k_UGCQueryHandleInvalid) return false;
+
+    auto request = std::find_if(ugc_queries.begin(), ugc_queries.end(), [&handle](struct UGC_query const& item) { return item.handle == handle; });
+    if (ugc_queries.end() == request) {
+        return false;
+    }
+
+    if (index >= request->results.size()) {
+        return false;
+    }
+
+    auto it = request->results.begin();
+    std::advance(it, index);
+    PublishedFileId_t file_id = *it;
+    set_details(file_id, pDetails, ver);
+    return true;
+}
+
+SteamAPICall_t Steam_UGC::internal_RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds, IUgcItfVersion ver )
+{
+    PRINT_DEBUG("%llu %u <%u>", nPublishedFileID, unMaxAgeSeconds, (unsigned)ver);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    
+    if (ver <= IUgcItfVersion::v018) { // <= SDK 1.59
+        SteamUGCRequestUGCDetailsResult018_t data{};
+        data.m_bCachedData = false;
+        set_details(nPublishedFileID, reinterpret_cast<SteamUGCDetails_t *>(&data.m_details), ver);
+        
+        auto ret = callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+        callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+        return ret;
+    } else { // >= SDK 1.60
+        SteamUGCRequestUGCDetailsResult_t data{};
+        data.m_bCachedData = false;
+        set_details(nPublishedFileID, &data.m_details, ver);
+        
+        auto ret = callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+        callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+        return ret;
+    }
+}
+
 
 Steam_UGC::Steam_UGC(class Settings *settings, class Ugc_Remote_Storage_Bridge *ugc_bridge, class Local_Storage *local_storage, class SteamCallResults *callback_results, class SteamCallBacks *callbacks)
 {
@@ -278,23 +337,13 @@ SteamAPICall_t Steam_UGC::SendQueryUGCRequest( UGCQueryHandle_t handle )
 bool Steam_UGC::GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails )
 {
     PRINT_DEBUG("%llu %u %p", handle, index, pDetails);
-    std::lock_guard<std::recursive_mutex> lock(global_mutex);
-    if (handle == k_UGCQueryHandleInvalid) return false;
+    return internal_GetQueryUGCResult(handle, index, pDetails, IUgcItfVersion::v020);
+}
 
-    auto request = std::find_if(ugc_queries.begin(), ugc_queries.end(), [&handle](struct UGC_query const& item) { return item.handle == handle; });
-    if (ugc_queries.end() == request) {
-        return false;
-    }
-
-    if (index >= request->results.size()) {
-        return false;
-    }
-
-    auto it = request->results.begin();
-    std::advance(it, index);
-    PublishedFileId_t file_id = *it;
-    set_details(file_id, pDetails);
-    return true;
+bool Steam_UGC::GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails )
+{
+    PRINT_DEBUG("%llu %u %p", handle, index, pDetails);
+    return internal_GetQueryUGCResult(handle, index, pDetails, IUgcItfVersion::v018);
 }
 
 std::optional<std::string> Steam_UGC::get_query_ugc_tag(UGCQueryHandle_t handle, uint32 index, uint32 indexTag)
@@ -841,20 +890,19 @@ bool Steam_UGC::SetTimeUpdatedDateRange( UGCQueryHandle_t handle, RTime32 rtStar
 SteamAPICall_t Steam_UGC::RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds )
 {
     PRINT_DEBUG("%llu", nPublishedFileID);
-    std::lock_guard<std::recursive_mutex> lock(global_mutex);
-    
-    SteamUGCRequestUGCDetailsResult_t data{};
-    data.m_bCachedData = false;
-    set_details(nPublishedFileID, &(data.m_details));
-    auto ret = callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
-    callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
-    return ret;
+    return internal_RequestUGCDetails(nPublishedFileID, unMaxAgeSeconds, IUgcItfVersion::v020);
+}
+ 
+SteamAPICall_t Steam_UGC::RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds )
+{
+    PRINT_DEBUG("%llu", nPublishedFileID);
+    return internal_RequestUGCDetails(nPublishedFileID, unMaxAgeSeconds, IUgcItfVersion::v018);
 }
 
 SteamAPICall_t Steam_UGC::RequestUGCDetails( PublishedFileId_t nPublishedFileID )
 {
     PRINT_DEBUG("old");
-    return RequestUGCDetails(nPublishedFileID, 0);
+    return RequestUGCDetails_old(nPublishedFileID, 0);
 }
 
 
diff --git a/sdk/steam/isteamugc001.h b/sdk/steam/isteamugc001.h
index 4e081f67..956c2c29 100644
--- a/sdk/steam/isteamugc001.h
+++ b/sdk/steam/isteamugc001.h
@@ -15,7 +15,7 @@ public:
 
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 
 	// Release the request to free up memory, after retrieving results
 	virtual bool ReleaseQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
diff --git a/sdk/steam/isteamugc002.h b/sdk/steam/isteamugc002.h
index ca5dc727..9aca06b7 100644
--- a/sdk/steam/isteamugc002.h
+++ b/sdk/steam/isteamugc002.h
@@ -16,7 +16,7 @@ public:
 
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 
 	// Release the request to free up memory, after retrieving results
 	virtual bool ReleaseQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
@@ -34,7 +34,7 @@ public:
 	virtual bool SetSearchText( UGCQueryHandle_t handle, const char *pSearchText ) = 0;
 	virtual bool SetRankedByTrendDays( UGCQueryHandle_t handle, uint32 unDays ) = 0;
 
-	virtual SteamAPICall_t RequestUGCDetails(PublishedFileId_t nPublishedFileID, uint32 uUnk) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old(PublishedFileId_t nPublishedFileID, uint32 uUnk) = 0;
 	
 	
 	// Steam Workshop Creator API
diff --git a/sdk/steam/isteamugc003.h b/sdk/steam/isteamugc003.h
index ecd9df5b..9e93c945 100644
--- a/sdk/steam/isteamugc003.h
+++ b/sdk/steam/isteamugc003.h
@@ -20,7 +20,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 
 	// Release the request to free up memory, after retrieving results
 	virtual bool ReleaseQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
@@ -41,7 +41,7 @@ public:
 	virtual bool SetRankedByTrendDays( UGCQueryHandle_t handle, uint32 unDays ) = 0;
 
 	// Request full details for one piece of UGC
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	virtual SteamAPICall_t CreateItem( AppId_t nConsumerAppId, EWorkshopFileType eFileType ) = 0; // create new item for this app with no content attached yet
diff --git a/sdk/steam/isteamugc004.h b/sdk/steam/isteamugc004.h
index b3147796..ce808518 100644
--- a/sdk/steam/isteamugc004.h
+++ b/sdk/steam/isteamugc004.h
@@ -19,7 +19,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	
 	// Release the request to free up memory, after retrieving results
 	virtual bool ReleaseQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
@@ -40,7 +40,7 @@ public:
 	virtual bool SetRankedByTrendDays( UGCQueryHandle_t handle, uint32 unDays ) = 0;
 
 	// Request full details for one piece of UGC
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	virtual SteamAPICall_t CreateItem( AppId_t nConsumerAppId, EWorkshopFileType eFileType ) = 0; // create new item for this app with no content attached yet
diff --git a/sdk/steam/isteamugc005.h b/sdk/steam/isteamugc005.h
index 5a440027..32da16f7 100644
--- a/sdk/steam/isteamugc005.h
+++ b/sdk/steam/isteamugc005.h
@@ -20,7 +20,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, char *pchMetadata, uint32 cchMetadatasize ) = 0;
@@ -52,7 +52,7 @@ public:
 	virtual bool SetRankedByTrendDays( UGCQueryHandle_t handle, uint32 unDays ) = 0;
 
 	// Request full details for one piece of UGC
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	virtual SteamAPICall_t CreateItem( AppId_t nConsumerAppId, EWorkshopFileType eFileType ) = 0; // create new item for this app with no content attached yet
diff --git a/sdk/steam/isteamugc006.h b/sdk/steam/isteamugc006.h
index f0b10fcc..a6c61f79 100644
--- a/sdk/steam/isteamugc006.h
+++ b/sdk/steam/isteamugc006.h
@@ -21,7 +21,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, char *pchMetadata, uint32 cchMetadatasize ) = 0;
@@ -54,7 +54,7 @@ public:
 	virtual bool SetRankedByTrendDays( UGCQueryHandle_t handle, uint32 unDays ) = 0;
 
 	// Request full details for one piece of UGC
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	virtual SteamAPICall_t CreateItem( AppId_t nConsumerAppId, EWorkshopFileType eFileType ) = 0; // create new item for this app with no content attached yet
diff --git a/sdk/steam/isteamugc007.h b/sdk/steam/isteamugc007.h
index b3c04a9d..a9aadcb0 100644
--- a/sdk/steam/isteamugc007.h
+++ b/sdk/steam/isteamugc007.h
@@ -20,7 +20,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, char *pchMetadata, uint32 cchMetadatasize ) = 0;
@@ -59,7 +59,7 @@ public:
 	 virtual bool AddRequiredKeyValueTag( UGCQueryHandle_t handle, const char *pKey, const char *pValue ) = 0;
 
 	// Request full details for one piece of UGC
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	virtual SteamAPICall_t CreateItem( AppId_t nConsumerAppId, EWorkshopFileType eFileType ) = 0; // create new item for this app with no content attached yet
diff --git a/sdk/steam/isteamugc008.h b/sdk/steam/isteamugc008.h
index 91770482..66a67ecd 100644
--- a/sdk/steam/isteamugc008.h
+++ b/sdk/steam/isteamugc008.h
@@ -21,7 +21,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, char *pchMetadata, uint32 cchMetadatasize ) = 0;
@@ -59,7 +59,7 @@ public:
 	 virtual bool AddRequiredKeyValueTag( UGCQueryHandle_t handle, const char *pKey, const char *pValue ) = 0;
 
 	// Request full details for one piece of UGC
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	virtual SteamAPICall_t CreateItem( AppId_t nConsumerAppId, EWorkshopFileType eFileType ) = 0; // create new item for this app with no content attached yet
diff --git a/sdk/steam/isteamugc009.h b/sdk/steam/isteamugc009.h
index 7d2ab483..e093b974 100644
--- a/sdk/steam/isteamugc009.h
+++ b/sdk/steam/isteamugc009.h
@@ -20,7 +20,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, char *pchMetadata, uint32 cchMetadatasize ) = 0;
@@ -59,7 +59,7 @@ public:
 	 virtual bool AddRequiredKeyValueTag( UGCQueryHandle_t handle, const char *pKey, const char *pValue ) = 0;
 
 	// Request full details for one piece of UGC
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	virtual SteamAPICall_t CreateItem( AppId_t nConsumerAppId, EWorkshopFileType eFileType ) = 0; // create new item for this app with no content attached yet
diff --git a/sdk/steam/isteamugc010.h b/sdk/steam/isteamugc010.h
index 0e1b557d..e2bec62e 100644
--- a/sdk/steam/isteamugc010.h
+++ b/sdk/steam/isteamugc010.h
@@ -23,7 +23,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchURLSize) char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchMetadatasize) char *pchMetadata, uint32 cchMetadatasize ) = 0;
 	virtual bool GetQueryUGCChildren( UGCQueryHandle_t handle, uint32 index, PublishedFileId_t* pvecPublishedFileID, uint32 cMaxEntries ) = 0;
@@ -60,7 +60,7 @@ public:
 	virtual bool AddRequiredKeyValueTag( UGCQueryHandle_t handle, const char *pKey, const char *pValue ) = 0;
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc011.h b/sdk/steam/isteamugc011.h
index 8b92b7eb..0f71bf04 100644
--- a/sdk/steam/isteamugc011.h
+++ b/sdk/steam/isteamugc011.h
@@ -25,7 +25,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchURLSize) char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchMetadatasize) char *pchMetadata, uint32 cchMetadatasize ) = 0;
 	virtual bool GetQueryUGCChildren( UGCQueryHandle_t handle, uint32 index, PublishedFileId_t* pvecPublishedFileID, uint32 cMaxEntries ) = 0;
@@ -62,7 +62,7 @@ public:
 	virtual bool AddRequiredKeyValueTag( UGCQueryHandle_t handle, const char *pKey, const char *pValue ) = 0;
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc012.h b/sdk/steam/isteamugc012.h
index ad0d1770..77daf972 100644
--- a/sdk/steam/isteamugc012.h
+++ b/sdk/steam/isteamugc012.h
@@ -26,7 +26,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchURLSize) char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchMetadatasize) char *pchMetadata, uint32 cchMetadatasize ) = 0;
 	virtual bool GetQueryUGCChildren( UGCQueryHandle_t handle, uint32 index, PublishedFileId_t* pvecPublishedFileID, uint32 cMaxEntries ) = 0;
@@ -63,7 +63,7 @@ public:
 	virtual bool AddRequiredKeyValueTag( UGCQueryHandle_t handle, const char *pKey, const char *pValue ) = 0;
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc013.h b/sdk/steam/isteamugc013.h
index 71b9c65e..29d71e3a 100644
--- a/sdk/steam/isteamugc013.h
+++ b/sdk/steam/isteamugc013.h
@@ -25,7 +25,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchURLSize) char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchMetadatasize) char *pchMetadata, uint32 cchMetadatasize ) = 0;
 	virtual bool GetQueryUGCChildren( UGCQueryHandle_t handle, uint32 index, PublishedFileId_t* pvecPublishedFileID, uint32 cMaxEntries ) = 0;
@@ -64,7 +64,7 @@ public:
 	virtual bool AddRequiredKeyValueTag( UGCQueryHandle_t handle, const char *pKey, const char *pValue ) = 0;
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc014.h b/sdk/steam/isteamugc014.h
index 321ec159..871dcd4a 100644
--- a/sdk/steam/isteamugc014.h
+++ b/sdk/steam/isteamugc014.h
@@ -28,7 +28,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual bool GetQueryUGCPreviewURL( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchURLSize) char *pchURL, uint32 cchURLSize ) = 0;
 	virtual bool GetQueryUGCMetadata( UGCQueryHandle_t handle, uint32 index, STEAM_OUT_STRING_COUNT(cchMetadatasize) char *pchMetadata, uint32 cchMetadatasize ) = 0;
 	virtual bool GetQueryUGCChildren( UGCQueryHandle_t handle, uint32 index, PublishedFileId_t* pvecPublishedFileID, uint32 cMaxEntries ) = 0;
@@ -72,7 +72,7 @@ public:
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
 	STEAM_CALL_RESULT( SteamUGCRequestUGCDetailsResult_t )
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc015.h b/sdk/steam/isteamugc015.h
index ca9090a5..18e51fe1 100644
--- a/sdk/steam/isteamugc015.h
+++ b/sdk/steam/isteamugc015.h
@@ -28,7 +28,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual uint32 GetQueryUGCNumTags( UGCQueryHandle_t handle, uint32 index ) = 0;
 	virtual bool GetQueryUGCTag( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
 	virtual bool GetQueryUGCTagDisplayName( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
@@ -74,7 +74,7 @@ public:
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
 	STEAM_CALL_RESULT( SteamUGCRequestUGCDetailsResult_t )
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc016.h b/sdk/steam/isteamugc016.h
index 0e37f77b..e4704fe6 100644
--- a/sdk/steam/isteamugc016.h
+++ b/sdk/steam/isteamugc016.h
@@ -27,7 +27,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual uint32 GetQueryUGCNumTags( UGCQueryHandle_t handle, uint32 index ) = 0;
 	virtual bool GetQueryUGCTag( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
 	virtual bool GetQueryUGCTagDisplayName( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
@@ -75,7 +75,7 @@ public:
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
 	STEAM_CALL_RESULT( SteamUGCRequestUGCDetailsResult_t )
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc017.h b/sdk/steam/isteamugc017.h
index f1b95fc0..9e3885fc 100644
--- a/sdk/steam/isteamugc017.h
+++ b/sdk/steam/isteamugc017.h
@@ -28,7 +28,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual uint32 GetQueryUGCNumTags( UGCQueryHandle_t handle, uint32 index ) = 0;
 	virtual bool GetQueryUGCTag( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
 	virtual bool GetQueryUGCTagDisplayName( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
@@ -78,7 +78,7 @@ public:
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
 	STEAM_CALL_RESULT( SteamUGCRequestUGCDetailsResult_t )
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )
diff --git a/sdk/steam/isteamugc018.h b/sdk/steam/isteamugc018.h
index d04ebe65..9a11e52e 100644
--- a/sdk/steam/isteamugc018.h
+++ b/sdk/steam/isteamugc018.h
@@ -5,6 +5,48 @@
 #pragma once
 #endif
 
+// Details for a single published file/UGC, up until interface v018
+struct SteamUGCDetails018_t
+{
+	PublishedFileId_t m_nPublishedFileId;
+	EResult m_eResult;												// The result of the operation.	
+	EWorkshopFileType m_eFileType;									// Type of the file
+	AppId_t m_nCreatorAppID;										// ID of the app that created this file.
+	AppId_t m_nConsumerAppID;										// ID of the app that will consume this file.
+	char m_rgchTitle[k_cchPublishedDocumentTitleMax];				// title of document
+	char m_rgchDescription[k_cchPublishedDocumentDescriptionMax];	// description of document
+	uint64 m_ulSteamIDOwner;										// Steam ID of the user who created this content.
+	uint32 m_rtimeCreated;											// time when the published file was created
+	uint32 m_rtimeUpdated;											// time when the published file was last updated
+	uint32 m_rtimeAddedToUserList;									// time when the user added the published file to their list (not always applicable)
+	ERemoteStoragePublishedFileVisibility m_eVisibility;			// visibility
+	bool m_bBanned;													// whether the file was banned
+	bool m_bAcceptedForUse;											// developer has specifically flagged this item as accepted in the Workshop
+	bool m_bTagsTruncated;											// whether the list of tags was too long to be returned in the provided buffer
+	char m_rgchTags[k_cchTagListMax];								// comma separated list of all tags associated with this file	
+	// file/url information
+	UGCHandle_t m_hFile;											// The handle of the primary file
+	UGCHandle_t m_hPreviewFile;										// The handle of the preview file
+	char m_pchFileName[k_cchFilenameMax];							// The cloud filename of the primary file
+	int32 m_nFileSize;												// Size of the primary file
+	int32 m_nPreviewFileSize;										// Size of the preview file
+	char m_rgchURL[k_cchPublishedFileURLMax];						// URL (for a video or a website)
+	// voting information
+	uint32 m_unVotesUp;												// number of votes up
+	uint32 m_unVotesDown;											// number of votes down
+	float m_flScore;												// calculated score
+	// collection details
+	uint32 m_unNumChildren;							
+};
+
+struct SteamUGCRequestUGCDetailsResult018_t
+{
+	enum { k_iCallback = k_iSteamUGCCallbacks + 2 };
+	SteamUGCDetails018_t m_details;
+	bool m_bCachedData; // indicates whether this data was retrieved from the local on-disk cache
+};
+
+
 class ISteamUGC018
 {
 public:
@@ -28,7 +70,7 @@ public:
 	virtual SteamAPICall_t SendQueryUGCRequest( UGCQueryHandle_t handle ) = 0;
 
 	// Retrieve an individual result after receiving the callback for querying UGC
-	virtual bool GetQueryUGCResult( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
+	virtual bool GetQueryUGCResult_old( UGCQueryHandle_t handle, uint32 index, SteamUGCDetails_t *pDetails ) = 0;
 	virtual uint32 GetQueryUGCNumTags( UGCQueryHandle_t handle, uint32 index ) = 0;
 	virtual bool GetQueryUGCTag( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
 	virtual bool GetQueryUGCTagDisplayName( UGCQueryHandle_t handle, uint32 index, uint32 indexTag, STEAM_OUT_STRING_COUNT( cchValueSize ) char* pchValue, uint32 cchValueSize ) = 0;
@@ -78,7 +120,7 @@ public:
 
 	// DEPRECATED - Use CreateQueryUGCDetailsRequest call above instead!
 	STEAM_CALL_RESULT( SteamUGCRequestUGCDetailsResult_t )
-	virtual SteamAPICall_t RequestUGCDetails( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
+	virtual SteamAPICall_t RequestUGCDetails_old( PublishedFileId_t nPublishedFileID, uint32 unMaxAgeSeconds ) = 0;
 
 	// Steam Workshop Creator API
 	STEAM_CALL_RESULT( CreateItemResult_t )