Well, IGN gave it a 9.2. And there is this:
And then there's the icing on the cake, a silly-yet-fun bonus co-op mode called Nacht der Untoten, or Night of the Undead. It's also referred to as Nazi Zombies, and it's a last stand against waves of oncoming zombies. You and up to three others are holed up inside a bunker; the zombies try to break down the barricades at the doors and windows and you have to kill them. Each wave becomes harder by throwing more zombies at you or making the zombies faster or both. You gain points for killing the zombies and for rebuilding the barricades, and these points can be used to purchase weapons, ammo, and access to other parts of the bunker. There's even a mystery box that can serve up a ray gun straight out of 1940s pulp fiction. Still, eventually the zombies will kill you, and the goal is to survive as long as possible to compare your performance on the leaderboard.
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