Kill 100 Zombies
Kill 1000 Zombies
Kill 3000 Zombies
Unlock all day levels
Unlock all night levels
Research 1 item
Research 10 items
Research everything
Beat wave 3 in 1 hit mode
Beat wave 3 of a night level
Beat wave 5 of a level
Evacuate successfully
Level up
Reach level 10
Nail 10 things
Nail 100 things
Harvest a tree for materials in the Forest or Island level
Beat wave 10 of any level
Beat the hard version of the final level