Here is the full list of all 27 Leave Me Alone achievements.
When you can not, but really want
Collect 250 smiles!
What do parents think?
Buy the ticket, take the ride
Just for kids
Get the maximum vitality
Get the maximum power
Get the maximum critical
Collect 50 smiles!
Kill a reptile in the sewers
Kill the hungry mad pet
Kill the lumberjack chief
Destroy all hearts of the Great Devourer
Kill the illusionist
Kill the Flaming Insane
Kill the temle guardian
Destroy the mothership
Kill the Alpha
Kill the last boss
Jump from the train and survive
Kill the acrobats
Collect 500 smiles!
Collect 1000 smiles!
Collect 15 skates!
Collect 35 skates!
Collect all skates!
Sweet revenge for passcode