Here is the full list of all 17 THE GREAT GEOMETRIC MULTIVERSE TOUR achievements.
Deal 1 million damage
Complete the Tutorial
Reach level 100
Reach level 500
Reach level 1,000
Complete SAVE THE MULTIVERSE
Deal 1 billion damage
Deal 1 trillion damage
Pick up 100 pills
Pick up 1,000 pills
Pick up 10,000 pills
Play with 1 or more cheats enabled
Play with 5 or more cheats enabled
Play with 10 or more cheats enabled
Liberate 50 Multiverses
Liberate 500 Multiverses
Liberate 5,000 Multiverses