This game is awesome. The single-player is good and the multiplayer is addicting.
Gameplay: Fast-paced action that will give you a adrenaline rush. The only problem is that some weapons(like the chaingun) are pretty weak compared to the other weapons. There are also some multiplayer glitches.
Graphics: At high settings, the textures are excellent, especially the armor. The special effects, like the burner, are nice to look at. The environments are nice too. The faces look kind of like shiny clay, though. It's weird.
Sound: The sounds effects are great. The music is ok. The voice acting is great, except for the death screams, which sounds held back. Seti's voice acting is kind of weird. It's scary in a different way.
Value: I got this game for $20, which is worth every penny. Now this game is like $5. It's a very good deal. You should get it.
Tilt: I though this was a very good game overall. It's worth buying.
Difficulty and Learning Curve: It takes a while to get used to the controls. Learning is pretty easy. Mastering the game is hard. But you learn as you go.
For those of you who do not want to get this game because there are not enough people online, you are not solving the problem. The more people who get this game, the more online players there will be.