Here is the full list of all 22 Righty Tighty XL achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Earn 50 Points in a single round
Unlock Mick and Rorty
Unlock all skins in the game
Earn 45 Points in a single round
Earn 750 points across all rounds
Unlock Bit Blaster
Unlock Orbt
Have a total of 50 near misses
Unlock Diamo
Earn 40 Points in a single round
Earn 35 Points in a single round
Unlock Ding Dong
Earn 30 Points in a single round
Unlock Purple
Unlock Orange
Earn 25 Points in a single round
Earn 20 Points in a single round
Earn 15 Points in a single round
Unlock Green
Unlock Blue
Earn 10 Points in a single round
Earn 5 Points in a single round