Just stay away from this.
Gameplay: X to fire (infinite ammo), O to jump, square to duck and triangle to switch weapons. Sounds easy, huh? Well, it's definitely not. You can't switch the direction you're facing while you firing, for example, which sucks. And you're pretty much being assaulted by men and machines everywhere, which makes it even harder.
Graphics: Blarg. They're not good. At all.
Sound: Tedious. You're better off listening to your mp3 than listening to the game's music, if you can call it that.
Replay Value: None. If you get past the first level, you'll be tired of it already.
Don't even rent this game: Not worth your time. Unless you're some diehard Contra fan.
Final score: 5.8 (approximately 6.0)