Rhombille Rex IIIThree intersecting circles, one of sixth order and two of third order.
Rhombus-Tri SliderA sliding piece puzzle similar to Elemental:Argon but with three plungers instead of four and some other small changes.
RigelTwo intersecting circles but with two concentric circles of pieces per half.
Rigel2A direct successor of Rigel from the same designer.
Rigel3A direct successor of Rigel from the same designer.
RokettoThree intersecting circles allowing turns in 180° and sometimes 36°.
RootingerTwo intersecting circles combined with a plunger.
Rota-RiusTwo very small circles and one plunger with six tiles.
RotaPlusThe Rotascope with the central piece unbandaged.
RotabramThree intersecting circles with gears. Pieces can be exchanged on two are rotated in each turn.
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