Fast, user-friendly cross-platform custom launcher for Minecraft
RetroArch is a frontend for emulators, game engines and media players.
A complete 3-D game development suite written in Java
Xash3D FWGS engine
s&box is a modern game engine, built on Valve's Source 2
Open source Old School RuneScape client
Open source simulation game based on Transport Tycoon Deluxe
3D space trading and combat game
API and runtime that allows access to VR hardware
A game engine powered by python and panda3d
Real Time Strategy game engine supporting early Westwood classics
Games for tomorrow's programmers
A nonsense activity generator
An open source implementation of the Ultima Online Classic Client
An updated version of the classic "Basic Computer Games" book
3D game engine/framework in C, with Luajit and Python bindings now
A dead simple 2D game engine for Go
The Pokémon API
Flexible level editor
IsoCity: City building simulation game
Simple GTK# Paint Program
Voxel game-creation platform with easy modding and game creation
A 2D rigid body physics engine for the web
Godot Minimal Theme