Zombie Babes or Tap Tap Metallica?

I’m geeking out over two new games for the iPhone and iPod Touch today, but I can’t decide which I’m geekier for. The first, profiled by Mashable, is Zombie Bikini Babes From Outer Space [iTunes Link], and the second is Tap Tap Metallica, which I discovered through Mashable as well.

Now, money-wise, this is an easy call: There’s a free version of Zombie Babes, and the paid version is just ninety-nine cents, whereas the Metallica app will run me $4.99 and includes a measley ten songs.

Both sound like impossibly dumb games, but sometimes the dumbest games are the most fun. Right? So, which would you choose?