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diff --git a/lsteamclient/steamworks_sdk_122/isteamgameserverstats.h b/lsteamclient/steamworks_sdk_122/isteamgameserverstats.h
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+++ b/lsteamclient/steamworks_sdk_122/isteamgameserverstats.h
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+//====== Copyright � Valve Corporation, All rights reserved. =======
+//
+// Purpose: interface for game servers to steam stats and achievements
+//
+//=============================================================================
+
+#ifndef ISTEAMGAMESERVERSTATS_H
+#define ISTEAMGAMESERVERSTATS_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "isteamclient.h"
+
+//-----------------------------------------------------------------------------
+// Purpose: Functions for authenticating users via Steam to play on a game server
+//-----------------------------------------------------------------------------
+class ISteamGameServerStats
+{
+public:
+	// downloads stats for the user
+	// returns a GSStatsReceived_t callback when completed
+	// if the user has no stats, GSStatsReceived_t.m_eResult will be set to k_EResultFail
+	// these stats will only be auto-updated for clients playing on the server. For other
+	// users you'll need to call RequestUserStats() again to refresh any data
+	virtual SteamAPICall_t RequestUserStats( CSteamID steamIDUser ) = 0;
+
+	// requests stat information for a user, usable after a successful call to RequestUserStats()
+	virtual bool GetUserStat( CSteamID steamIDUser, const char *pchName, int32 *pData ) = 0;
+	virtual bool GetUserStat( CSteamID steamIDUser, const char *pchName, float *pData ) = 0;
+	virtual bool GetUserAchievement( CSteamID steamIDUser, const char *pchName, bool *pbAchieved ) = 0;
+
+	// Set / update stats and achievements. 
+	// Note: These updates will work only on stats game servers are allowed to edit and only for 
+	// game servers that have been declared as officially controlled by the game creators. 
+	// Set the IP range of your official servers on the Steamworks page
+	virtual bool SetUserStat( CSteamID steamIDUser, const char *pchName, int32 nData ) = 0;
+	virtual bool SetUserStat( CSteamID steamIDUser, const char *pchName, float fData ) = 0;
+	virtual bool UpdateUserAvgRateStat( CSteamID steamIDUser, const char *pchName, float flCountThisSession, double dSessionLength ) = 0;
+
+	virtual bool SetUserAchievement( CSteamID steamIDUser, const char *pchName ) = 0;
+	virtual bool ClearUserAchievement( CSteamID steamIDUser, const char *pchName ) = 0;
+
+	// Store the current data on the server, will get a GSStatsStored_t callback when set.
+	//
+	// If the callback has a result of k_EResultInvalidParam, one or more stats 
+	// uploaded has been rejected, either because they broke constraints
+	// or were out of date. In this case the server sends back updated values.
+	// The stats should be re-iterated to keep in sync.
+	virtual SteamAPICall_t StoreUserStats( CSteamID steamIDUser ) = 0;
+};
+
+#define STEAMGAMESERVERSTATS_INTERFACE_VERSION "SteamGameServerStats001"
+
+// callbacks
+#pragma pack( push, 8 )
+
+//-----------------------------------------------------------------------------
+// Purpose: called when the latests stats and achievements have been received
+//			from the server
+//-----------------------------------------------------------------------------
+struct GSStatsReceived_t
+{
+	enum { k_iCallback = k_iSteamGameServerStatsCallbacks };
+	EResult		m_eResult;		// Success / error fetching the stats
+	CSteamID	m_steamIDUser;	// The user for whom the stats are retrieved for
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: result of a request to store the user stats for a game
+//-----------------------------------------------------------------------------
+struct GSStatsStored_t
+{
+	enum { k_iCallback = k_iSteamGameServerStatsCallbacks + 1 };
+	EResult		m_eResult;		// success / error
+	CSteamID	m_steamIDUser;	// The user for whom the stats were stored
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: Callback indicating that a user's stats have been unloaded.
+//  Call RequestUserStats again to access stats for this user
+//-----------------------------------------------------------------------------
+struct GSStatsUnloaded_t
+{
+	enum { k_iCallback = k_iSteamUserStatsCallbacks + 8 };
+	CSteamID	m_steamIDUser;	// User whose stats have been unloaded
+};
+
+#pragma pack( pop )
+
+
+#endif // ISTEAMGAMESERVERSTATS_H