Icosi-Do

Icosi-Do is a minimalist logic puzzle game about swapping pairs of colored rods. At each of the puzzle’s 30 corners, the four rods that meet there must all have different colors. This is an edge-coloring problem, and each puzzle limits the number of swaps you can make unless you turn that limit off.

Puzzle modes

The game includes thousands of procedurally generated puzzles across dozens of difficulty levels, from very easy to extremely difficult. Its four single-player modes vary two rules: whether swaps are limited, and whether the different rod types appear as colors or as rotations. Shared-screen cooperative and competitive multiplayer modes are also available.

The puzzles combine edge coloring on an icosidodecahedral graph with a gradual learning curve and more challenging modes. The design is inspired by a fictional game from a popular science-fiction TV series.

Other features

• Each puzzle has a six-digit code that you can use to replay and share it.
• The menu forms its text from the same 60 swirling rods used in the puzzles.
• The soundtrack uses procedurally modified versions of three preludes by Johann Sebastian Bach, arranged in dozens of variations, from slow piano to fast guitar.
• The game has 29 achievements and three leaderboards.
• Tilt Five glasses are supported but not required. A second pair can be used by a spectator.