No missable achievements (plus 16 unknown)
Sign in with Steam or Xbox to track your progress, and:
Turn a human into zombie
Die for the very first time
Lose a zombie
Turn 10 soldiers into zombies
Collect 20 stars
Collect 40 stars
Finish all winter levels
Finish the game
Beat all summer levels with total time lower than 15 minutes
Collect 60 stars
Beat all winter levels with total time lower than 8 minutes
Play at least one community level
Collect 90 stars