[quote][b]Posted by:[/b] Demerzel [quote][b]Posted by:[/b] Admiral Termo Well, the engine appears to be mostly in house. The physics engine is Havok-based *shudder* but I think pretty much everything else they programmed themselves.[/quote] This. Bungie does most of its own engineering work, whether it be physics, graphics or audio engineering.[/quote] Exactly they used there own engine in this game.