OpenAL-Soft

Warzone 2100Warzone2100/warzone2100

A free, open-source 3D real-time strategy game with a story-driven campaign, online multiplayer, and customizable units.

FamistudioBleuBleu/FamiStudio

A cross-platform music editor for creating authentic NES chiptunes, supporting multiple expansion chips and export formats.

Q2RTXNVIDIA/Q2RTX

NVIDIA's implementation of Quake II with fully path-traced global illumination using RTX ray-tracing technology.

nCinenCine/nCine

A cross-platform 2D game engine written in C++11 with optional Lua scripting, emphasizing performance.

Nazara EngineNazaraEngine/NazaraEngine

A cross-platform C++ framework for building real-time applications with 2D/3D rendering, audio, physics, and networking.

Aleph OneAleph-One-Marathon/alephone

Open source continuation of Bungie's Marathon 2 game engine for playing Marathon series games and third-party content.

LibrelancerLibrelancer/Librelancer

An open-source re-implementation of the 2003 space simulation game Freelancer, built with C# and OpenGL.

Carnage3Dcodenamecpp/carnage3d

An open-source reimplementation of Grand Theft Auto 1 (GTA1) using modern technologies, playable in a web browser.

PlasmaH-uru/Plasma

A CMake-based fork of the CyanWorlds.com Engine focused on bug-fixes, cross-platform compatibility, and enhanced features.

Rootexsdslabs/rootex

An advanced C++ 3D game engine with a full editor, ECS architecture, and DirectX 11 renderer, powering an in-production game.