Here is the full list of all 21 Planet Lander achievements.
Complete stage 14
Complete stage 13
Complete stage 12
Complete stage 11
Complete stage 10
Complete stage 9
Complete stage 8
Complete stage 7
Complete stage 6
Complete stage 5
Complete stage 4
Complete stage 3
Complete stage 2
Complete stage 1
Complete stage 21
Complete stage 20
Complete stage 19
Complete stage 18
Complete stage 17
Complete stage 16
Complete stage 15