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