Here is the full list of all 37 RAD achievements.
Do someone a solid
Participate in a Daily Challenge
Upgrade Shermie's Shop
Upgrade Shermie's Shop to the max!
Become a Platinum member
Become a Desert Chrome member
Pop a chicken with your snake head
Eject 100 tapes from an ATM
Heal, Burn and Heal some more using fruit
Defeat the Colossus
Complete Cathode Raider Tasks
Complete Transfigured Tasks
Complete Vestigial Tasks
Conceive a serpent baby
Discover a Mutation Combo
Fully upgrade the town statue
Annihilate 5 enemies at once
Completed the game De-Made style
Unlock 25% of the Tome of the Ancients
Unlock 50% of the Tome of the Ancients
Unlock 75% of the Tome of the Ancients
Unlock 100% of the Tome of the Ancients
Get a Kill Streak of 10 or more
Get a Survivor Streak of 10 or more
Shamefully fall to your death while fighting the Colossus
Unlock all styles
Unlock all weapons
Unlock all Quirks
Receive a tasty beverage from the Mender altar
Receive a cash payout from the Mender altar
Receive disapproval from the Mender altar
Steal a key from a shop using Suck Face
Help Billy farm a plant
Help Billy complete his garden
Load your body up with the bummer mutation trifecta
Capitalize on your bodaciousness
Stay aloft for 10 seconds