No missable achievements (plus 10 unknown)
Sign in with Steam or Xbox to track your progress, and:
Perform Rampage attack
Kill first undead boss
Earn 10.000.000 experience points in a session
Rack up to 30th level
Crash atleast 100 cars in one session
Use melee attack 100 times in a session
Do not shoot for 6 minutes
Stay live atleast 60 minutes
Kill atleast 1.000 zombies with each weapon type
Kill 500.000 zombies