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