Recurse
Experience recursion
Level select select
Use the area select in the hub
Challenge puzzle
Solve a red challenge puzzle
Side puzzle
Solve a blue side puzzle
Double
No description
Inverse
No description
Push against yourself
No description
Cycle
Cause a cycle
Oh dear
No description
Solid
No description
Infinity
Cause a paradox
Epsilon
Cause another paradox
Paradox paradox
Cause a chain of paradoxes
Even
Solve the Even side puzzles
Oblong
Solve the Oblong side puzzles
Friend
Solve the Friend side puzzles
One
Solve the One side puzzles
Bottom of the rabbit hole
Reach the end
Alternate universes
Solve all non-challenge puzzles in the appendix area
Tidy
Solve all puzzles in 4 different areas
200 solved
Solve 200 puzzles
Perfect Parabox
Solve all puzzles