Online since 2002. The most comprehensive site for all around twisty puzzles.

OctagramAn octagonal prism with cuts so deep that three types of pieces are present.
OctoSunThe Clover Octahedron with enhanced turning capabilities.
Offset OctaA puzzle related to Minimal Octa reimplementing Star Trap in a minimalistic way.

Olympic Rings (circles)Five intersecting circles with a puzzle theme based on the Olympic Rings.
Os CubeA 2x2x2 which uniform tiles retract or extended when the puzzle is turned.
Over-and-UnderThree rings with seventeen marbles each, unconnected but exchangeable.

Pac-ManA retro puzzle. A shape transformed and customly painted 3x3x3.
Pac-Man CubePac man accompanied by its four adversaries on a simple shape transformation.
Pastilla 2x2x4A 2x2x4 transformed into the shape of a pill.

Pebble ZockA 2x2x3 reshaped into a hexagonal prism and then placed in midturn.
Penguin 2x2x3A 2x2x3 remodeled into a penguin.
Penrose Dino CubeA Dino Cube truncated into three round surfaces in a spiral pattern.

Penrose GearA Gear Cube with the shape of a Penrose Cube.
Penrose SkewbA Skewb truncated into three round surfaces in a spiral pattern.
Penta Crazy EdgeA pentagonal prism with two layers for all six axes.

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