Engines

• PopCap Games
• Presto
• Prince of Persia: The Sands of Time
• Prism3D
• Professional Adventure Writer
• Pterodon
• PTK Toolkit
• Puyo Puyo
• Pygame
• Pyrogenesis
• Q
• Qfusion
• Qt
• Quake engine
• Quake II engine
• Quantum3
• Qube Software
• Quest3D
• QuickTime
• QuickTime VR
• R.C. Pro-Am
• Reality Engine
• RealLive
• RealSpace
• Real Virtuality
• Reason
• REDengine
• RE Engine
• Refractor
• Refractor 2