If you haven't checked out InsideMacGames today: Lego Star Wars coming to the Mac: http://insidemacgames.com/news/story.php?ID=10976 I have my doubts it'll run on my iMac G4 (even though it looks like a lightweight game), but this was definitely a game I was excited about when it was announced for the consoles and PC. Now it's coming to the Mac! Unreal 3 and Aegia has an Aspyr connection: http://insidemacgames.com/news/story.php?ID=10975 Aegia creates some sort of physics processing unit (PPU). Some interesting possibilities can happen with Aspyr being a partner. It may be one of the ways to get around Havok, but I am not completely sure about that, so don't take my word for it.