The game's menu greets you with ill-suited blaring rock music that doesn't fit the tone of the game that follows. (When you're trying to survive the zombie apocalypse, your first step is probably not to turn on a soaring guitar solo to draw attention to yourself and your roving gang of gunmen.) The single-player campaign is a quick six-mission distraction to introduce you to the core multiplayer action, with only two missions actually reflecting that core experience. The game opens up with you defending your buddy's escape plan (his car) from a meager offering of slow-moving, mostly nonthreatening undead.