Here is the full list of all 32 Idle Zombies Clicker achievements.
Buy 1000 upgrades
Play for 100 hours
Complete 1000 levels
Kill 10000 enemies
Complete the game 10 times
Earn 1B gold
Buy 100 upgrades
Complete the game 5 times
Defeat 1000 bosses
Earn 10M gold
Defeat 100 bosses
Play for 10 hours
Buy all helpers
Buy 50 helpers
Buy 10 helpers
Kill 1000 enemies
Buy 10 upgrades
Play for 1 hour
Complete 100 levels
Earn 100K gold
Complete the game once
Defeat 10 bosses
Buy 1 helper
Kill 100 enemies
Earn 1K gold
Complete 10 levels
Defeat one boss
Buy 1 upgrade
Kill 10 enemies
Complete 1 level
Earn 10 gold
Kill 1 enemy