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