Here is the full list of all 20 Geometry Survivor achievements.
Survive for 20 minutes
Survive for 19 minutes
Survive for 18 minutes
Survive for 17 minutes
Survive for 16 minutes
Survive for 15 minutes
Survive for 14 minutes
Survive for 13 minutes
Survive for 12 minutes
Survive for 11 minutes
Survive for 10 minutes
Survive for 9 minutes
Survive for 8 minutes
Survive for 7 minutes
Survive for 6 minutes
Survive for 5 minutes
Survive for 4 minutes
Survive for 3 minutes
Survive for 2 minutes
Survive for 1 minutes