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Six-Sided: Cube (Shape Preserving)
BrilicubeA modification of the 3x3x3 inspired by the redesign of the pyraminx crystal.
Brilicube RevengeA 4x4x4 without faces.
C-Skewb VA Dayan Gem V modified into cubic shape.

C-Skewb VIIIA Dayan Gem VIII modified into cubic shape.
Chameleon CubeA puzzle equivalent to a Super Rainbow Cube.
CheeseblockA 2x2x2 with 6 circular sectors on each face.

Childs PlayTwo 2x2x2's which have to be solved "together".
Chimera (4x4x6x6 cube)A combination of a 4x4x4 and a 6x6x6. Inspired by Tony Fishers V-Dome and implementing two AI-Cubes.
Chopped-3A hybrid puzzle combining a 3x3x3 and a restricted little chop.

Circle DinoCould be treated as a slices only variant of a higher order skewb.
Circle SkewbA corner-turning hexahedron with three logical layers. It looks as if "circle moves" were added to the skewb.
Clover CubeA hybrid of Curvy Copter and 2x2x2.

ComboCopterA hybrid puzzle which combines a 2x2x2 with a Curvy Copter.
Compass CubeA strangely bandaged 3x3x3. It unintentionally is the first physical implementation of something very close to the imaginary pieces.
Compy CubeA shallow cut Dino Cube

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