| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Raiders of the Holy Stones | Heiko Spies | 2021 | English | |
| Red Crash | British International School of Washington | 2021 | English | |
| Red Soldier, The | Dan Egnor, Manda Whitney | 2021 | English | |
| Reflections | Tristin Grizel Dean | 2021 | English | Solution, Map |
| Return to the Stars | Adrian Welcker | 2021 | English | |
| River of Blood, The | Dee Cooke |
2021 | English | |
| Room of Escape, The | Errol Elumir | 2021 | English | |
| Rotten Wooden Room, The | Jasmine Crystal Chopyk | 2021 | English | Solution, Map |