I'm not going to say that there is nothing redeeming about this game. It is fun to just kill zombies and aliens willy nilly. However this is completely lost in a horrible re-spawning system where every time you die, the wait to re-spawn doubles, friendly fire that is completely unavoidable and unable to turn off, half your weapons cause exploding damage that pretty much means you will hit one of your friends and a complete lack of healing. I played the game on easy and spent more time dead than alive because apparently difficulty doesn't matter in this game. You will die.