Anyone who needs it, I'm planning to delete the game. So, if you're not a personal friend of mine and want it, be on-line between 7:30-8am EST (roughly 8 hours from now, currently 11:18PM EST) and I'll set up rooms to pass the achievement on. If I'm late, just wait and I'll adjust the time I'll be doing this accordingly (may need to stop at store for something to drink haha).
GT: Apoch Weiss
Send me a message with "Zombification" in it.
Also, try this, not sure how it works but I got it from reaching 21 Z points (total according to leaderboards) and also won 10 gold medals from on-line ranked match play. I think you just need to win 10 games if you can't find someone with the achievement.
Now with film and game reviews (just for fun)!