A fancy self-hosted monitoring tool
Open source simulation game based on Transport Tycoon Deluxe
Mangos ZERO is a server for World of Warcraft
You can make it - Open Source MMORPG Platform
Cross-Platform C++ 2D/3D game engine
Descent 3 by Outrage Entertainment
Open-source OpenGL/SDL2 reimplementation of Sid Meier's Alpha Centauri
Widelands is a free, open source real-time strategy game
Map Pixel Art Generator for Minecraft
Source code repository of the FreeOrion project
Open source library for creative expression on the web, desktop, etc.
Distributed server for social and realtime games and apps
Examples for 3DS using devkitARM, libctru, citro3d and citro2d
Satisfying monster shooter
Netcode that provides networking capabilities to GameObject workflows
Lutris desktop client in Python
Lossless Scaling Frame Generation on Linux
Cocos simplifies game creation and distribution with Cocos Creator
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
OpenSoldat is a unique 2D (side-view) multiplayer action game
MCDaemon, a python tool to control your Minecraft server
A community sourced database of game controller mappings
Cross-platform 2D and 3D game engine with modular architecture
A multithreaded Minecraft server built for redstone