Here is the full list of all 22 Rogue'n Roll achievements.
Unlock 20 powerups
Achieve level 25
Make your way through the cave
Have 1000 golds in your wallet
Unlock 10 powerups
Achieve level 10
We all know who is the real monster here
You kill a lot of things
Get over 500 kills in a single game
Have 200 golds in your wallet
Make your way through the city
Get over 200 kills in a single game
Unlock 10 weapons
Level up for the first time
Make your way through the forest
Get over 50 kills in a single game
Roll random rewards for the first time
Make your way through the hell
Unlock 20 weapons
Achieve level 50
Achieve level 100
You should consider spending them