diff --git a/code/client/cl_parse.c b/code/client/cl_parse.c
index 00c0f8d..b376d0a 100644
--- a/code/client/cl_parse.c
+++ b/code/client/cl_parse.c
@@ -435,7 +435,7 @@ void CL_SystemInfoChanged( void ) {
 	}
 	// if game folder should not be set and it is set at the client side
 	if ( !gameSet && *Cvar_VariableString("fs_game") ) {
-		Cvar_Set( "fs_game", "" );
+		Cvar_Set( "fs_game", "rpgxEF" );
 	}
 	cl_connectedToPureServer = Cvar_VariableValue( "sv_pure" );
 }
diff --git a/code/client/cl_ui.c b/code/client/cl_ui.c
index afb72cd..f9776cf 100644
--- a/code/client/cl_ui.c
+++ b/code/client/cl_ui.c
@@ -657,7 +657,7 @@ CLUI_SetCDKey
 #ifndef STANDALONE
 static void CLUI_SetCDKey( char *buf ) {
 	cvar_t	*fs;
-	fs = Cvar_Get ("fs_game", "", CVAR_INIT|CVAR_SYSTEMINFO );
+	fs = Cvar_Get ("fs_game", "rpgxEF", CVAR_INIT|CVAR_SYSTEMINFO );
 	if (UI_usesUniqueCDKey() && fs && fs->string[0] != 0) {
 		Com_Memcpy( &cl_cdkey[16], buf, 16 );
 		cl_cdkey[32] = 0;
diff --git a/code/qcommon/files.c b/code/qcommon/files.c
index f71f31f..231cbe7 100644
--- a/code/qcommon/files.c
+++ b/code/qcommon/files.c
@@ -3175,7 +3175,7 @@ static void FS_Startup( const char *gameName )
 		homePath = fs_basepath->string;
 	}
 	fs_homepath = Cvar_Get ("fs_homepath", homePath, CVAR_INIT|CVAR_PROTECTED );
-	fs_gamedirvar = Cvar_Get ("fs_game", "", CVAR_INIT|CVAR_SYSTEMINFO );
+	fs_gamedirvar = Cvar_Get ("fs_game", "rpgxEF", CVAR_INIT|CVAR_SYSTEMINFO );
 
 	// add search path elements in reverse priority order
 	if (fs_basepath->string[0]) {
@@ -3222,7 +3222,7 @@ static void FS_Startup( const char *gameName )
 		cvar_t	*fs;
 
 		Com_ReadCDKey(BASEGAME);
-		fs = Cvar_Get ("fs_game", "", CVAR_INIT|CVAR_SYSTEMINFO );
+		fs = Cvar_Get ("fs_game", "rgpxEF", CVAR_INIT|CVAR_SYSTEMINFO );
 		if (fs && fs->string[0] != 0) {
 			Com_AppendCDKey( fs->string );
 		}
@@ -3937,7 +3937,7 @@ void FS_InitFilesystem( void ) {
 	Com_StartupVariable("fs_game");
 
 	if(!FS_FilenameCompare(Cvar_VariableString("fs_game"), com_basegame->string))
-		Cvar_Set("fs_game", "");
+		Cvar_Set("fs_game", "rpgxEF");
 
 	// try to start up normally
 	FS_Startup(com_basegame->string);
diff --git a/code/ui/ui_main.c b/code/ui/ui_main.c
index a8a4d86..cdae81b 100644
--- a/code/ui/ui_main.c
+++ b/code/ui/ui_main.c
@@ -3341,7 +3341,7 @@ static void UI_RunMenuScript(char **args) {
 		} else if (Q_stricmp(name, "RunDemo") == 0) {
 			trap_Cmd_ExecuteText( EXEC_APPEND, va("demo %s\n", uiInfo.demoList[uiInfo.demoIndex]));
 		} else if (Q_stricmp(name, "Quake3") == 0) {
-			trap_Cvar_Set( "fs_game", "");
+			trap_Cvar_Set( "fs_game", "rpgxEF");
 			trap_Cmd_ExecuteText( EXEC_APPEND, "vid_restart;" );
 		} else if (Q_stricmp(name, "closeJoin") == 0) {
 			if (uiInfo.serverStatus.refreshActive) {