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

Telescopic rods
AbyssA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 8-cell (also known as Hypercube or Tesseract)
AfroditeA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope rectified 5-cell (also known as Tetroctahedric)
ArgoA puzzle which is based on the sixth dimensional symmetry of the 6-Simplex.

CerberusSix telescopic rods have to be arranged into a pentagram.
ChronosA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 5-cell (also known as Pentachoron)
ColossusA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 24-cell (also known as Icositetrachoron).

CosmosThis puzzle pretends to be based on a 4D polytope but it is not. Instead it is a cube with its antipodes connected.
GorgonA puzzle based on the Petersen's Graph.
Houlis CubeA puzzle which is based on the fourth dimensional symmetry 4D polytope known as hexadecachoron (or 16-cell).

PegasusA puzzle which is based on the fifth dimensional symmetry of the 5-Simplex.
Pyramus & ThisbeA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope Tetrahedral prism

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