Sequels on letters
R, r
- Race's Challenge
- Radiation Zone
- Rafting
- Rahul Batra's Tic-Tac-Toe
- Ranarama
- Ravenon
- Reciprocate
- Red Baron
- Red Cross Return
- Red Rose
- Ri Edouard
- Riplles
- River Euphrates
- River Euphrates second edit
- River Patrol
- River Tomek
- Robinson Crusoe's Puzzle
- Rock Around The Block
- Roman Helmet
- Ron Meijer's Tank
- Rotary Mirrors LTG
- Rotary Mirrors Letter
- Rotary Nightmare
- Rotating A-Ts
- Rubies collecting
- Rude Reductionism
- Run baby run
- Runaway Tank
- Röhrichtflötentöne