This game rocks !! The only bad points are the old style graphics. The actual gameplay is awesome. The guns available are sweet and plentiful throughout all levels. I own this one and will NOT ever sell or trade it.
I've played Halo on XBOX and this is just like it. I actually like this game better. The graphics are pretty good, the gameplay is awesome, it has a co-op mode, and it has so many 2 player games on it. There are plenty of levels to keep you busy for a while and when you beat it, you can play the 2 player games for hours. Overall, it's a pretty sweet game. I'm writing this review in 2007, and I still think it's a fun game to play. Not expensive at all also.