Here is the full list of all 25 Planet of Lana achievements.
Game completed without dying
All achievements completed
A mystical discovery
Pet Mui for the first time
Sneaking past the chef
Discovered a secret shrine
All secret shrines discovered
Completing the game
Freeing Mui
Finding a way in
Making it past the robot army
Finding the bracelet
Finding the amulet
Rescuing Mui
Surviving the invasion
Together to the end