Professor Mirror BlockThis is a shape modification of a 5x5x5 cube that implements the same concept as the Mirror Blocks (aka Bump Cube).
Professor TruncatedA Rubiks 5x5x5 truncated on all eight corners. The truncation stopped halfway to a cuboctahedron.
Pseudo 10x10x10A sticker scheme to create confusion. A 5x5x5, inspired by a 6x6x6 but stickered to resemble a 10x10x10.
Rhombicuboctahedral 5x5x5A 5x5x5 truncated on the edges and corners to create a shape closely related to the rhombicuboctahedron.
Rubik's Studio 5x5x5The new retooled version of Rubik's Revenge produced in Hungary by Rubik's Studio
Rubik's WahnEarly Arxon version. Alternatively labeled: "The very ultimate in cube puzzles"