20,000 Zombies Killed
Last 30 seconds with 25+ zombies on fire
Kill the away team Zombie
200 Zombies sent dancing
20 Brains Sucked
200 Zombies blown up
20 Chainsaw Combos
Complete Zombie Academy.
All Arcade Levels Unlocked
All Bronze Medals
All Levels Unlocked
All Silver Medals
All Gold Medals
All Developer Medals