portable C++ GUI library designed for games using Allegro, SDL and/or OpenGL, comes with a standard set of widgets and can use several different backends for displaying graphics and grabbing user input
a free, turn based strategy game. It is designed in the tradition of the Battle Isle series from Bluebyte and is currently available for Windows, MacOS X and Linux.
an open-source vertical scroller game programmed in C++,OpenGL and SDL. It's designed to run on all important platforms like Linux, MacOS X, Windows, Solaris. (Cool Graphics)
web archive of game manuals, high quality scanned images of instruction manuals in their full, original format with all original artwork and other graphical elements intact
a comprehensive system for designing realistic NPC AI for persistant worlds. It uses a meme metaphor to rationalize the "hows and whys" of NPC life. The Memetic AI Toolkit provides an artificial life designer with a host of tools, documentation, example c
game programming tutorials and source code for a variety of languages and platforms. Also, because this is a wiki, you are encouraged to contribute your knowledge and help the repository grow!
a high-level graphical application framework. Although Agar was initially developed as a game engine for the upcoming Trek to the Cave, it is also being used in different types of applications, such as CAD.