Pretty much all of them as near as I can tell, provided you're willing to set up and run an SDK. However, I'm getting the feeling that Valve isn't planning to do things this way as they've already ported two of their engines to Desktop Linux and promised to do Lin/Mac/Win releases of all their games going forward. Granted, caution is always good, but I think there's some real merit here for hope.
Originally Posted by Pallidus
Wow, you're pretty quick to sling the homo-as-an-insult thing, aren't you? That's projection. Probably from having your uncle rape you. No fair asking other people for help. Everybody has you on their ignore list anyway, and nobody cares about your daddy issues, you gutter-mud whore.