Reaction is a free-to-play first person shooter that combines action and realism; with a specific emphasis on action over realism in...
Citadel is a faithful remake of the original game System Shock created in 1994 by Looking Glass Studios.
XLE is a open-source (MIT license) game engine currently in development at XL Games.
The Cafu Engine is an all-purpose, modern 3D graphics engine and game development kit, feature complete to get you started quickly.
Raydium is a game engine. It provides a set of functions wich allow quick and flexible games creation.
Platinum Arts Sandbox Free 3D Game Maker is an open source easy to use standalone 3D Game Maker and 3D Game Design program currently...
Ren'Py is a visual novel engine – used by hundreds of creators from around the world – that helps you use words, images, and sounds...
Tesseract is a first-person shooter game focused on instagib deathmatch and capture-the-flag gameplay as well as cooperative in-game map editing.
DarkPlaces is a Quake modification I have built over the course of 6 years on and off experimenting, it got somewhat of an overhaul...