Here is the full list of all 17 THE GREAT GEOMETRIC MULTIVERSE TOUR achievements.
Complete the Tutorial
Reach level 100
Reach level 500
Reach level 1,000
Complete SAVE THE MULTIVERSE
Deal 1 million damage
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