Engines

• Refractor Engine
• RenderWare
• Ren'Py
• Resident Evil 4
• Retro Engine
• Riot Engine
• Road Hog Engine
• Rockstar Advanced Game Engine
• ROM
• RPG Maker
• RPG Maker 2000
• RPG Maker 2003
• RPG Maker 95
• RPG Maker Dante 98 II
• RPG Maker MV
• RPG Maker MZ
• RPG Maker VX
• RPG Maker VX Ace
• RPG Maker XP
• RSPiX
• Ruby on Rails
• RuneTek
• S2 Games
• Saber Interactive
• SAGA System
• SAGE
• Sauerbraten Game Engine
• SCUMM
• Sega Mega-Tech
• Sequent