This is a game that should have been one of the best action games ever made; however this game is just an average action game. For me this was a good purchase, however it wasn't what I had expected it to be. This game has good gameplay. It should have been excellent, however it is ruined by the storyline. The storyline is completely horrible and did not appeal to me at all. The best thing about the gameplay is that it has four-player co-op. This feature makes the gameplay great and fun to play with your friends. If you enjoyed the gameplay in Halo and are waiting for Halo 2 this is a good game to get while you are waiting. This is basically Halo, with a not so good storyline, but the only differences in the gameplay is that two more people can play on the story mode, which makes it more fun to play. I, myself, prefer the storyline of either Halo, Jedi Outcast, C&C Renegade, or Half-Life, instead of this game's storyline. The graphics are great Xbox graphics, however evan from the beginning I wanted them to be more realistic. Don't get me wrong, the graphics are great and flawless, but I am expecting some thing more realistic. For example, like the graphics I am expecting to see in Doom III, Quake IV, and Half-Life II. The game has great sound effects, but they're also not expected to be. There not all that better the sound effects in Halo. The replay value is very good; I will keep play this game for a long time with my friends. The multiplayer mode is awesome also fun to play, but yet again it is not better then Halo's multiplayer. This is a good game, but it's not what I had expected it to be. I think this is an awesome rent. However, the game is not wroth 50$. I recommend this game to all action gamers, as a rent!