Kill a billion humans
Spawn a billion zombies
Kill a million humans
Spawn a million zombies
Drown 200 zombies
Reach 150 zombies alive
Drown 50 humans
Reach 100 zombies alive
Explode 1000 boomers
Finish Chapter 1, Level 1
Finish Chapter 1, Level 2
Finish Chapter 1, Level 3
Finish Chapter 1, Level 4
Finish Chapter 1, Level 5
Finish Chapter 1, Level 6
Finish Chapter 1, Level 7
Lvl 5, explode all racers
Lvl 5, dont kill a single red neck
Lvl 5, have 50 zombies rammed by racers
Finish level in less than 240 seconds
Finish level in less than 640 seconds
Finish level in less than 1080 seconds
Finish level in less than 570 seconds
Finish level in less than 530 seconds
Finish level in less than 780 seconds
Finish level in less than 730 seconds
Finish level having spawned less than 40 Biter zombies (starter zombies count)
Finish level having spawned less than 11 Biter zombies (starter zombies count)
Finish level having spawned less than 50 Biter zombies (starter zombies count)
Finish level having spawned less than 10 Biter zombies (starter zombies count)
Chapter 1, Level 3, Make 100 zombies trip over
Chapter 1, Level 4, don't drown a single zombie
Chapter 1, Level 6, dont use the Ressource Extractors that appear mid-waves
Reach 120 zombies alive