| title | developer | year | platform | | pop. |
|---|
| Quantum Break | Remedy Entertainment | 2016 | Windows | shooter Science Fiction | image | | label | |
| Quantum Conscience | Woodsy Studio | 2014 | Linux | adventure Science Fiction | | | label | |
| Quest for Infamy | Infamous Adventures | 2014 | Linux | adventure Fantasy | | subject | label | |
| Quest for Infamy: Roehm to Ruin | Infamous Adventures | 2015 | Linux | adventure Fantasy | | | label | |
| Quicksilver | Voltisoft | 2014 | Linux | shooter | | | label | |
| quiz | author | 1993 | Linux | trivia/quiz | image | subject | label | |
| Raid on Fort Apocalypse | Notsoft Games | 2008 | Linux | shooter | | | label | |
| Railway Empire | Kalypso Media Digital | 2021 | Linux | | | | label | |
| Rain on Your Parade | Unbound Creations | 2021 | Linux | | | | label | |
| Rainbow Rooms | author | 2012 | Linux | maze puzzle | | | label | |
| Ramayana | author | 2016 | Linux | | | | label | |
| Rangerdog | OOEGAMES | 2021 | Linux | shooter | | | label | |
| Realm of the Diggle Gods | Gaslamp Games | 2012 | Linux | role-play | | | label | |
| RealTimeBattle | author | 2000 | Linux | shooter strategy | | subject | label | |
| RealTimeBattle | author | 2000 | Windows | shooter strategy | | | label | |
| RECOG The First Wave | LozMarblz | 2018 | Linux | strategy Science Fiction | | | label | |
| Red String of Fate | Ebullience Games | 2016 | Mac OS X | adventure Fantasy | | | label | |
| Regnum Online - Warmasters | NGD Studios | 2008 | Linux | role-play | | | label | |
| Regnum Online | NGD Studios | 2002 | Linux | role-play | | | label | |
| Remnant: From the Ashes | Gunfire Games | 2019 | Windows | action/reflex Fantasy | | | label | |
| Retro Commander | Noble Master Games | 2013 | Linux | strategy | image | subject | label | |
| Return of Dr. Destructo | ZX Studio | 2014 | Linux | shooter | | | label | |
| Return to Planet X | Butterflyware | 2017 | Linux | shooter | | | label | |
| ReTux | author | 2015 | Linux | platformer Cartoon | | | label | |
| Revenge of the Titans | Puppy Games | 2010 | Linux | strategy Science Fiction | image | | label | |
| Revenge Quest | Fyn Games | 2017 | Linux | | | | label | |
| Reverie Knights Tactics | 40 Giants Entertainment | 2022 | Linux | role-play turn-based Fantasy | | | label | |
| Revhead | Creative Pudding Hungary | 2017 | Linux | simulation racing/driving | | | label | |
| Reynard | Filipinjo;bostjang | 2018 | Linux | action/reflex strategy role-play | | | label | |
| rFactor | Image Space Incorporated | 2005 | Windows | racing/driving | | | label | |
| Righty Tighty XL | Nickervision Studios | 2018 | Linux | | | | label | |
| Rigs of Rods | author | 2011 | Linux | simulation flight racing/driving | | | label | |
| Rising Constellation | Blackflag Games | 2021 | Linux | strategy Science Fiction | | | label | |
| Risk System | Newt Industries | 2019 | Linux | shooter | | | label | |
| Road Dogs | Teletower Studios | 2017 | Linux | role-play | | | label | |
| robots | author | 1993 | Linux | strategy turn-based | image | subject | label | |
| RollerCoaster Tycoon World | Nvizzio Creations | 2015 | Linux | simulation | | | label | |
| RufasSlider | Fast RGV | 2014 | Linux | puzzle | | | label | |
| RufasSok | Fast RGV | 2014 | Linux | puzzle | | | label | |
| Ruin Diver III | author | 2011 | Linux | platformer Fantasy | | | label | |
| RuneScape NXT | Jagex | 2016 | Linux | adventure role-play Fantasy | | | label | |
