diff --git a/dll/dll/steam_user_stats.h b/dll/dll/steam_user_stats.h
index bee3b2fb..4f8556e2 100644
--- a/dll/dll/steam_user_stats.h
+++ b/dll/dll/steam_user_stats.h
@@ -58,6 +58,8 @@ struct achievement_trigger {
 };
 
 class Steam_User_Stats :
+public ISteamUserStats001,
+public ISteamUserStats002,
 public ISteamUserStats003,
 public ISteamUserStats004,
 public ISteamUserStats005,
@@ -404,6 +406,31 @@ public:
 
     bool GetAchievementProgressLimits( const char *pchName, float *pfMinProgress, float *pfMaxProgress );
 
+    // old interface version
+    uint32 GetNumStats( CGameID nGameID );
+    const char *GetStatName( CGameID nGameID, uint32 iStat );
+    ESteamUserStatType GetStatType( CGameID nGameID, const char *pchName );
+    uint32 GetNumAchievements( CGameID nGameID );
+    const char *GetAchievementName( CGameID nGameID, uint32 iAchievement );
+    uint32 GetNumGroupAchievements( CGameID nGameID );
+    const char *GetGroupAchievementName( CGameID nGameID, uint32 iAchievement );
+    bool RequestCurrentStats( CGameID nGameID );
+    bool GetStat( CGameID nGameID, const char *pchName, int32 *pData );
+    bool GetStat( CGameID nGameID, const char *pchName, float *pData );
+    bool SetStat( CGameID nGameID, const char *pchName, int32 nData );
+    bool SetStat( CGameID nGameID, const char *pchName, float fData );
+    bool UpdateAvgRateStat( CGameID nGameID, const char *pchName, float flCountThisSession, double dSessionLength );
+    bool GetAchievement( CGameID nGameID, const char *pchName, bool *pbAchieved );
+    bool GetGroupAchievement( CGameID nGameID, const char *pchName, bool *pbAchieved );
+    bool SetAchievement( CGameID nGameID, const char *pchName );
+    bool SetGroupAchievement( CGameID nGameID, const char *pchName );
+    bool StoreStats( CGameID nGameID );
+    bool ClearAchievement( CGameID nGameID, const char *pchName );
+    bool ClearGroupAchievement( CGameID nGameID, const char *pchName );
+    int GetAchievementIcon( CGameID nGameID, const char *pchName );
+    const char *GetAchievementDisplayAttribute( CGameID nGameID, const char *pchName, const char *pchKey );
+    bool IndicateAchievementProgress( CGameID nGameID, const char *pchName, uint32 nCurProgress, uint32 nMaxProgress );
+
 };
 
 #endif//__INCLUDED_STEAM_USER_STATS_H__
diff --git a/dll/steam_client_interface_getter.cpp b/dll/steam_client_interface_getter.cpp
index 4ec3d508..897c1a9c 100644
--- a/dll/steam_client_interface_getter.cpp
+++ b/dll/steam_client_interface_getter.cpp
@@ -478,8 +478,11 @@ ISteamUserStats *Steam_Client::GetISteamUserStats( HSteamUser hSteamUser, HSteam
     PRINT_DEBUG("%s", pchVersion);
     if (!steam_pipes.count(hSteamPipe) || !hSteamUser) return NULL;
 
-     // v001, v002 Not found in public Archive, must be before 1.00
-    if (strcmp(pchVersion, "STEAMUSERSTATS_INTERFACE_VERSION003") == 0) {
+    if (strcmp(pchVersion, "STEAMUSERSTATS_INTERFACE_VERSION001") == 0) {
+        return reinterpret_cast<ISteamUserStats *>(static_cast<ISteamUserStats001 *>(steam_user_stats));
+    } else if (strcmp(pchVersion, "STEAMUSERSTATS_INTERFACE_VERSION002") == 0) {
+        return reinterpret_cast<ISteamUserStats *>(static_cast<ISteamUserStats002 *>(steam_user_stats));
+    } else if (strcmp(pchVersion, "STEAMUSERSTATS_INTERFACE_VERSION003") == 0) {
         return reinterpret_cast<ISteamUserStats *>(static_cast<ISteamUserStats003 *>(steam_user_stats));
     } else if (strcmp(pchVersion, "STEAMUSERSTATS_INTERFACE_VERSION004") == 0) {
         return reinterpret_cast<ISteamUserStats *>(static_cast<ISteamUserStats004 *>(steam_user_stats));
diff --git a/dll/steam_user_stats.cpp b/dll/steam_user_stats.cpp
index c804b087..71b61832 100644
--- a/dll/steam_user_stats.cpp
+++ b/dll/steam_user_stats.cpp
@@ -152,6 +152,288 @@ SteamAPICall_t Steam_User_Stats::GetNumberOfCurrentPlayers()
 
 
 
+// --- old interface version
+
+uint32 Steam_User_Stats::GetNumStats( CGameID nGameID )
+{
+    PRINT_DEBUG("old %llu", nGameID.ToUint64());
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return 0;
+    }
+    return (uint32)settings->getStats().size();
+}
+
+const char *Steam_User_Stats::GetStatName( CGameID nGameID, uint32 iStat )
+{
+    PRINT_DEBUG("old %llu [%u]", nGameID.ToUint64(), iStat);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    auto &stats = settings->getStats();
+    if (settings->get_local_game_id() != nGameID || iStat >= stats.size()) {
+        return "";
+    }
+    
+    return std::next(stats.begin(), iStat)->first.c_str();
+}
+
+ESteamUserStatType Steam_User_Stats::GetStatType( CGameID nGameID, const char *pchName )
+{
+    PRINT_DEBUG("old %llu '%s'", nGameID.ToUint64(), pchName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    
+    if (settings->get_local_game_id() != nGameID || !pchName) {
+        return ESteamUserStatType::k_ESteamUserStatTypeINVALID;
+    }
+    
+    std::string stat_name(common_helpers::to_lower(pchName));
+    const auto &stats = settings->getStats();
+    auto stat_info = stats.find(stat_name);
+    if (stats.end() == stat_info) {
+        return ESteamUserStatType::k_ESteamUserStatTypeINVALID;
+    }
+
+    switch (stat_info->second.type)
+    {
+    case GameServerStats_Messages::StatInfo::STAT_TYPE_INT: return ESteamUserStatType::k_ESteamUserStatTypeINT;
+    case GameServerStats_Messages::StatInfo::STAT_TYPE_FLOAT: return ESteamUserStatType::k_ESteamUserStatTypeFLOAT;
+    case GameServerStats_Messages::StatInfo::STAT_TYPE_AVGRATE: return ESteamUserStatType::k_ESteamUserStatTypeAVGRATE;
+    
+    default: PRINT_DEBUG("[X] unhandled type %i", (int)stat_info->second.type); break;
+    }
+    
+    return ESteamUserStatType::k_ESteamUserStatTypeINVALID;
+}
+
+uint32 Steam_User_Stats::GetNumAchievements( CGameID nGameID )
+{
+    PRINT_DEBUG("old %llu", nGameID.ToUint64());
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return 0;
+    }
+    
+    return GetNumAchievements();
+}
+
+const char *Steam_User_Stats::GetAchievementName( CGameID nGameID, uint32 iAchievement )
+{
+    PRINT_DEBUG("old %llu [%u]", nGameID.ToUint64(), iAchievement);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return "";
+    }
+    
+    return GetAchievementName(iAchievement);
+}
+
+uint32 Steam_User_Stats::GetNumGroupAchievements( CGameID nGameID )
+{
+    PRINT_DEBUG("old %llu // TODO", nGameID.ToUint64());
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return 0;
+    }
+    
+    return 0;
+}
+
+const char *Steam_User_Stats::GetGroupAchievementName( CGameID nGameID, uint32 iAchievement )
+{
+    PRINT_DEBUG("old %llu [%u] // TODO", nGameID.ToUint64(), iAchievement);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return "";
+    }
+    
+    return "";
+}
+
+bool Steam_User_Stats::RequestCurrentStats( CGameID nGameID )
+{
+    PRINT_DEBUG("old %llu", nGameID.ToUint64());
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return RequestCurrentStats();
+}
+
+bool Steam_User_Stats::GetStat( CGameID nGameID, const char *pchName, int32 *pData )
+{
+    PRINT_DEBUG("old %llu '%s' %p", nGameID.ToUint64(), pchName, pData);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    
+    if (pData) *pData = 0;
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return GetStat(pchName, pData);
+}
+
+bool Steam_User_Stats::GetStat( CGameID nGameID, const char *pchName, float *pData )
+{
+    PRINT_DEBUG("old %llu '%s' %p", nGameID.ToUint64(), pchName, pData);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    
+    if (pData) *pData = 0;
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return GetStat(pchName, pData);
+}
+
+bool Steam_User_Stats::SetStat( CGameID nGameID, const char *pchName, int32 nData )
+{
+    PRINT_DEBUG("old %llu '%s' %i", nGameID.ToUint64(), pchName, nData);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return SetStat(pchName, nData);
+}
+
+bool Steam_User_Stats::SetStat( CGameID nGameID, const char *pchName, float fData )
+{
+    PRINT_DEBUG("old %llu '%s' %f", nGameID.ToUint64(), pchName, fData);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return SetStat(pchName, fData);
+}
+
+bool Steam_User_Stats::UpdateAvgRateStat( CGameID nGameID, const char *pchName, float flCountThisSession, double dSessionLength )
+{
+    PRINT_DEBUG("old %llu '%s' %f %f", nGameID.ToUint64(), pchName, flCountThisSession, dSessionLength);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return UpdateAvgRateStat(pchName, flCountThisSession, dSessionLength);
+}
+
+bool Steam_User_Stats::GetAchievement( CGameID nGameID, const char *pchName, bool *pbAchieved )
+{
+    PRINT_DEBUG("old %llu '%s' %p", nGameID.ToUint64(), pchName, pbAchieved);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    
+    if (pbAchieved) *pbAchieved = false;
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return GetAchievement(pchName, pbAchieved);
+}
+
+bool Steam_User_Stats::GetGroupAchievement( CGameID nGameID, const char *pchName, bool *pbAchieved )
+{
+    PRINT_DEBUG("old %llu '%s' %p // TODO", nGameID.ToUint64(), pchName, pbAchieved);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    
+    if (pbAchieved) *pbAchieved = false;
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return false;
+}
+
+bool Steam_User_Stats::SetAchievement( CGameID nGameID, const char *pchName )
+{
+    PRINT_DEBUG("old %llu '%s'", nGameID.ToUint64(), pchName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID && settings->achievement_bypass) {
+        return false;
+    }
+    
+    return SetAchievement(pchName);
+}
+
+bool Steam_User_Stats::SetGroupAchievement( CGameID nGameID, const char *pchName )
+{
+    PRINT_DEBUG("old %llu '%s' // TODO", nGameID.ToUint64(), pchName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return false;
+}
+
+bool Steam_User_Stats::StoreStats( CGameID nGameID )
+{
+    PRINT_DEBUG("old %llu", nGameID.ToUint64());
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return StoreStats();
+}
+
+bool Steam_User_Stats::ClearAchievement( CGameID nGameID, const char *pchName )
+{
+    PRINT_DEBUG("old %llu '%s'", nGameID.ToUint64(), pchName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return ClearAchievement(pchName);
+}
+
+bool Steam_User_Stats::ClearGroupAchievement( CGameID nGameID, const char *pchName )
+{
+    PRINT_DEBUG("old %llu '%s' // TODO", nGameID.ToUint64(), pchName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return 0;
+    }
+    
+    return false;
+}
+
+int Steam_User_Stats::GetAchievementIcon( CGameID nGameID, const char *pchName )
+{
+    PRINT_DEBUG("old %llu '%s'", nGameID.ToUint64(), pchName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return Settings::INVALID_IMAGE_HANDLE;
+    }
+    
+    return GetAchievementIcon(pchName);
+}
+
+const char *Steam_User_Stats::GetAchievementDisplayAttribute( CGameID nGameID, const char *pchName, const char *pchKey )
+{
+    PRINT_DEBUG("old %llu '%s' ['%s']", nGameID.ToUint64(), pchName, pchKey);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return "";
+    }
+    
+    return GetAchievementDisplayAttribute(pchName, pchKey);
+}
+
+bool Steam_User_Stats::IndicateAchievementProgress( CGameID nGameID, const char *pchName, uint32 nCurProgress, uint32 nMaxProgress )
+{
+    PRINT_DEBUG("old %llu '%s' %u %u", nGameID.ToUint64(), pchName, nCurProgress, nMaxProgress);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (settings->get_local_game_id() != nGameID) {
+        return false;
+    }
+    
+    return IndicateAchievementProgress(pchName, nCurProgress, nMaxProgress);
+}
+
+
 // --- steam callbacks
 
 void Steam_User_Stats::steam_run_callback()
diff --git a/sdk/steam/steam_api.h b/sdk/steam/steam_api.h
index ad77f406..42283499 100644
--- a/sdk/steam/steam_api.h
+++ b/sdk/steam/steam_api.h
@@ -104,6 +104,8 @@
 #include "isteamuserstats005.h"
 #include "isteamuserstats004.h"
 #include "isteamuserstats003.h"
+#include "isteamuserstats002.h"
+#include "isteamuserstats001.h"
 #include "isteamapps.h"
 #include "isteamapps007.h"
 #include "isteamapps006.h"