Here is the full list of all 42 Mini Knight achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Go Left
Go Right
Mute
12 Lvl completed
End Game
Last Step
Music 12
11 Lvl completed
Music 11
10 Lvl completed
Music 10
9 Lvl completed
Music 9
8 Lvl completed
Music 8
7 Lvl completed
Bandit 3 Dead
Music 7
6 Lvl completed
Music 6
Middle Game
5 Lvl completed
Music 5
4 Lvl completed
1/3 of the game
Music 4
3 Lvl completed
Game Over
First Death
Music 3
2 Lvl completed
Music 2
Bandit 1 Dead
1 Lvl completed
Bandit 2 Dead
Jump
First Restart
Pause 2
Pause
Fall
Music 1
Start Game