diff --git a/include/core.h b/include/core.h
index 88544ca..691c412 100644
--- a/include/core.h
+++ b/include/core.h
@@ -58,12 +58,14 @@ enum TaskID
 enum GameFlags
 {
    GAME_CSTRIKE16 = (1 << 0), // Counter-Strike 1.6 and Above
-   GAME_XASH = (1 << 1), // Counter-Strike 1.6 under the xash engine (additional flag)
+   GAME_XASH_ENGINE = (1 << 1), // Counter-Strike 1.6 under the xash engine (additional flag)
    GAME_CZERO = (1 << 2), // Counter-Strike: Condition Zero
    GAME_LEGACY = (1 << 3), // Counter-Strike 1.3-1.5 with/without Steam
    GAME_MOBILITY = (1 << 4), // additional flag that bot is running on android (additional flag)
    GAME_OFFICIAL_CSBOT = (1 << 5), // additional flag that indicates official cs bots are in game
-   GAME_METAMOD = (1 << 6)
+   GAME_METAMOD = (1 << 6), // game running under metamod
+   GAME_SUPPORT_SVC_PINGS = (1 << 7), // on that game version we can fake bots pings
+   GAME_SUPPORT_BOT_VOICE = (1 << 8) // on that game version we can use chatter
 };
 
 // bot menu ids
diff --git a/project/makefile b/project/makefile
index 65ab843..e97397c 100644
--- a/project/makefile
+++ b/project/makefile
@@ -55,7 +55,7 @@ endif
 LINK += -m32 -lm -ldl
 
 CFLAGS += -msse2 -std=c++11 -m32 -Wall -Werror -Wextra
-CPPFLAGS += -fno-exceptions -fno-rtti -fno-builtin
+CPPFLAGS += -fno-exceptions -fno-rtti
 
 BINARY = $(PROJECT).$(LIB_EXT)
 
diff --git a/source/basecode.cpp b/source/basecode.cpp
index 273bc17..3b20d0f 100644
--- a/source/basecode.cpp
+++ b/source/basecode.cpp
@@ -1445,7 +1445,7 @@ void Bot::PurchaseWeapons (void)
    bool teamEcoValid = bots.IsEcoValid (m_team);
 
    // do this, because xash engine is not capable to run all the features goldsrc, but we have cs 1.6 on it, so buy table must be the same
-   bool isOldGame = (g_gameFlags & GAME_LEGACY) && !(g_gameFlags & GAME_XASH);
+   bool isOldGame = (g_gameFlags & GAME_LEGACY) && !(g_gameFlags & GAME_XASH_ENGINE);
 
    switch (m_buyState)
    {
diff --git a/source/interface.cpp b/source/interface.cpp
index 90b022e..23a9434 100644
--- a/source/interface.cpp
+++ b/source/interface.cpp
@@ -2419,7 +2419,7 @@ void pfnMessageBegin (int msgDest, int msgType, const float *origin, edict_t *ed
    }
    engine.ResetMessageCapture ();
 
-   if ((!(g_gameFlags & GAME_LEGACY) || (g_gameFlags & GAME_XASH)) && msgDest == MSG_SPEC && msgType == engine.FindMessageId (NETMSG_HLTV))
+   if ((!(g_gameFlags & GAME_LEGACY) || (g_gameFlags & GAME_XASH_ENGINE)) && msgDest == MSG_SPEC && msgType == engine.FindMessageId (NETMSG_HLTV))
       engine.SetOngoingMessageId (NETMSG_HLTV);
 
    engine.TryCaptureMessage (msgType, NETMSG_WEAPONLIST);
@@ -3029,7 +3029,7 @@ Library *LoadCSBinary (void)
          // detect xash engine
          if (g_engfuncs.pfnCVarGetPointer ("build") != nullptr)
          {
-            g_gameFlags |= (GAME_LEGACY | GAME_XASH);
+            g_gameFlags |= (GAME_LEGACY | GAME_XASH_ENGINE);
 
             if (g_gameFlags & GAME_METAMOD)
             {
@@ -3088,7 +3088,7 @@ DLL_GIVEFNPTRSTODLL GiveFnptrsToDll (enginefuncs_t *functionTable, globalvars_t
    }
 
 #ifdef PLATFORM_ANDROID
-   g_gameFlags |= (GAME_LEGACY | GAME_XASH | GAME_MOBILITY);
+   g_gameFlags |= (GAME_LEGACY | GAME_XASH_ENGINE | GAME_MOBILITY);
 
    if (g_gameFlags & GAME_METAMOD)
       return;  // we should stop the attempt for loading the real gamedll, since metamod handle this for us
@@ -3127,7 +3127,7 @@ DLL_GIVEFNPTRSTODLL GiveFnptrsToDll (enginefuncs_t *functionTable, globalvars_t
       else if (g_gameFlags & GAME_CSTRIKE16)
          gameVersionStr.Assign ("v1.6");
 
-      if (g_gameFlags & GAME_XASH)
+      if (g_gameFlags & GAME_XASH_ENGINE)
       {
          gameVersionStr.Append (" @ Xash3D Engine");
 
diff --git a/source/navigate.cpp b/source/navigate.cpp
index 576143f..14e4e5b 100644
--- a/source/navigate.cpp
+++ b/source/navigate.cpp
@@ -1107,7 +1107,7 @@ bool Bot::DoWaypointNav (void)
          if (Random.Int (1, 100) < 50)
          {
             // do not use door directrly under xash, or we will get failed assert in gamedll code
-            if (g_gameFlags & GAME_XASH)
+            if (g_gameFlags & GAME_XASH_ENGINE)
                pev->button |= IN_USE;
             else
                MDLL_Use (tr.pHit, GetEntity ()); // also 'use' the door randomly
diff --git a/source/support.cpp b/source/support.cpp
index 66a5898..0d2402b 100644
--- a/source/support.cpp
+++ b/source/support.cpp
@@ -149,7 +149,7 @@ void DisplayMenuToClient (edict_t *ent, MenuId menu)
          break;
       }
    }
-   const char *displayText = ((g_gameFlags & (GAME_XASH | GAME_MOBILITY)) && !yb_display_menu_text.GetBool ()) ? " " : menuPtr->text.GetBuffer ();
+   const char *displayText = ((g_gameFlags & (GAME_XASH_ENGINE | GAME_MOBILITY)) && !yb_display_menu_text.GetBool ()) ? " " : menuPtr->text.GetBuffer ();
 
    while (strlen (displayText) >= 64)
    {
@@ -528,7 +528,7 @@ void CheckWelcomeMessage (void)
 
    Array <String> sentences;
 
-   if (!(g_gameFlags & (GAME_MOBILITY | GAME_XASH)))
+   if (!(g_gameFlags & (GAME_MOBILITY | GAME_XASH_ENGINE)))
    {
       // add default messages
       sentences.Push ("hello user,communication is acquired");
@@ -554,7 +554,7 @@ void CheckWelcomeMessage (void)
 
    if (receiveTime > 0.0f && receiveTime < engine.Time () && !alreadyReceived && (g_numWaypoints > 0 ? g_gameWelcomeSent : true))
    {
-      if (!(g_gameFlags & (GAME_MOBILITY | GAME_XASH)))
+      if (!(g_gameFlags & (GAME_MOBILITY | GAME_XASH_ENGINE)))
          engine.IssueCmd ("speak \"%s\"", const_cast <char *> (sentences.GetRandomElement ().GetBuffer ()));
 
       engine.ChatPrintf ("----- %s v%s (Build: %u), {%s}, (c) 2016, by %s (%s)-----", PRODUCT_NAME, PRODUCT_VERSION, GenerateBuildNumber (), PRODUCT_DATE, PRODUCT_AUTHOR, PRODUCT_URL);