I love Nazi Zombies because the whole game is not a matter of how you win, but how long you can last before being torn to pieces by the brain hungry undead. There is no happy ending, you never outlast the waves and waves of monsters to be rescued or just go home and forget about it. You know from the beginning that you will die, its only a matter of time and you just want to drag as many of those brainless beasts down with you. Going at it along is suicide, many people have trouble making it past the tenth round. You need a team, at least one other person to watch your back.