| .rgss3a |
RPG Maker VX Ace RGSS Encrypted Archive |
| .rgssad |
RPG Maker VX RGSS Encrypted Archive |
| .rvproj2 |
RPG Maker VX Ace Project File |
| .rvdata2 |
RPG Maker VX Ace Data File |
| .rpgproject |
RPG Maker MV Project |
| .rttex |
Robinson Technologies Texture File |
| .rbxmx |
ROBLOX Model |
| .rgd |
Raft Saved Game File |
| .rot |
Homeworld 2 Graphics File |
| .rfc |
Ravenfield Content File |
| .rfd |
Recogniform Form Designer File |
| .rpyc |
Ren'Py Compiled Script |
| .rgss2a |
RPG Maker VX RGSS Encrypted Archive |
| .rfgs_pc |
Red Faction: Guerilla Saved Game File |
| .rl |
R.viewer List File |
| .rws |
RimWorld Game Save File |
| .rda |
R Data File |
| .rim |
BioWare Resource Image File |
| .rmf |
Hammer Rich Map Format |
| .ros |
BattleScribe Roster Editor File |
| .rbj |
XRK Compiled Redcode Object File |
| .rel |
Relocatable Module File |
| .rasunsoft |
Rasunsoft Game Replay File |
| .rgt |
Relic Entertainment Game Texture File |