eric0279 yes, you can see enum codes here
Code:
enum EngineVersion
{
Engine_Unknown, /**< Could not determine the engine version */
Engine_Original, /**< Original Source Engine (used by The Ship) */
Engine_SourceSDK2006, /**< Episode 1 Source Engine (second major SDK) */
Engine_SourceSDK2007, /**< Orange Box Source Engine (third major SDK) */
Engine_Left4Dead, /**< Left 4 Dead */
Engine_DarkMessiah, /**< Dark Messiah Multiplayer (based on original engine) */
Engine_Left4Dead2 = 7, /**< Left 4 Dead 2 */
Engine_AlienSwarm, /**< Alien Swarm (and Alien Swarm SDK) */
Engine_BloodyGoodTime, /**< Bloody Good Time */
Engine_EYE, /**< E.Y.E Divine Cybermancy */
Engine_Portal2, /**< Portal 2 */
Engine_CSGO, /**< Counter-Strike: Global Offensive */
Engine_CSS, /**< Counter-Strike: Source */
Engine_DOTA, /**< Dota 2 */
Engine_HL2DM, /**< Half-Life 2 Deathmatch */
Engine_DODS, /**< Day of Defeat: Source */
Engine_TF2, /**< Team Fortress 2 */
Engine_NuclearDawn /**< Nuclear Dawn */
};