Thing is, Halo for the Pc sucks. It's a crappy port, like many others. The end. I find it weird to play the pc version, there's just something wrong, and I don't find it fun. I think it's the speed of the game that's not suited for the mouse + keyboard. But then again, I think that what makes Halo so great is multiplayer, especially co-op. In 2001 and 2004 there wasn't a game that could even get close to Halo co-op, and most of you pc players couldn't enjoy a significant part of the game. That and the fact that Halo for pc comes like 3 years after it's out, which makes it's experience outdated.