Maps and levels
Clear every wave to finish a level, then the squad moves to the next map. After level 9 the journey loops with harder zombies.
Level 1 · Office
Level 2 · Dust II
Level 3 · Italy
Level 4 · Train
Level 5 · Mansion
Level 6 · Inferno
Level 7 · Aztec
Level 8 · Nuke
Level 9 · Piazza
Play now — free
Open the link, pick a name, and you are in.