All Silver medals.
Beat ten of your friends on any leaderboard in an In Space level.
Get 100 Gatling Gun combos in the Engine Room.
All Bronze medals.
Transport 1000 Zombies off the Mothership Bridge.
Survive 5 minutes with one life in Survival mode on Extreme difficulty in an In Space level.
100,000 Zombies killed.
All levels unlocked.
All Arcade levels unlocked.
100 Brains sucked.
1000 Zombies sent dancing.
1000 Zombies blown up.
100 Chainsaw Combos.
Complete Zombie Academy.
Last 30 seconds with 50+ zombies on fire.
Kill the away team Zombie.
Fill the screen with the maximum amount of blood on any level.
All Gold medals.
All Developer medals.
100 Shotgun combos in a Zombie Sushi level.
Kill 1000 Zombies with the lightning strike.
Beat ten of your friends on any leaderboard in a Zombie Sushi level.
Survive 5 minutes with one life in Survival mode on Extreme difficulty in a Zombie Sushi level.
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