openage is a free cross-platform RTS game engine that provides the mechanics of Age of Empires. Using modern technologies as C++17, OpenGL/GLSL, Python, Qt5 and CMake allows people using GNU/Linux, BSD, macOS or Windows to play the game natively. Our aim is to make openage a platform for the original Age of Empires games providing the same look and feel, but with more features for modding and multiplayer. openage uses an open API powered by our human-readable configuration language nyan. ...
Vega Strike is a 3d OpenGL Action Space Sim for Win/Lin/Mac allowing players to trade, bounty hunt, or explore in a vast universe.
Active development is now on https://github.com/vegastrike and on http://www.vega-strike.org
Vega Strike is mod ready and network playable.
landshade is a C++ library for quick tesselation of complex 3D data like terrain and other curves surfaces at different levels of detail on modern graphics hardware.
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Crystal Space is an Open Source 3D SDK for Unix, Windows, and MacOS/X. It renders with OpenGL and features GLSL shaders, CG shaders, deferred rendering, dynamic shadows, bullet based physics library, terrain engine, skeleton based animation meshes, exporter for Blender, portals, etc...
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XreaL is a heavily improved Quake 3 Arena engine. It's bundled with new tools and a demo game that was never finished. ET:XreaL is a subproject bringing all XreaL enhancements to Return to Castle Wolfenstein: Enemy Territory.
Habanero3d is a object-oriented 3d game engine written in C++, OpenGL, and GLSL with set of additional tools (written in number of languages), to make developers' life easier.
Habanero3d is targeted for indie games, and is in development.
A furious top-down 2D / pseudo-3D scrolling space shooter game with lots of bullets in the air. Gameplay, extensionability and visual design is the main focus of the project.