Halo 2 is a just like the Tribes series for the PC except Tribes is free (well Tribes 1) and Halo 2 is about $30-50. It's a good game if you have never played Tribes. I like Socom 2 Navy Seals a lot better than Halo 2. I've never played Halo 2, but have seen people play and it looks a lot like a Tribes Starsiege.