A new Minecraft world editor and converter
A sharp, readable, vector-y version of Monocraft
The source code to VVVVVV
Set of Python modules designed for writing video games
A game engine powered by python and panda3d
Ct.js is a desktop game engine that makes learning programming fun
Free game engine for development of desktop, mobile, and web games
3D Game engine with editor
Stride (formerly Xenko), a free and open-source cross-platform C# game
A generic, simple and fast implementation of Deepmind's AlphaZero
An updated version of the classic "Basic Computer Games" book
Source code repository of the FreeOrion project
Games for tomorrow's programmers
An OpenGL RTS game engine written in C
Action-adventure game originally released in 2013
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Free, open source game engine online
The Tiny JavaScript Game Engine That Can!
The flexible game engine
World Class Leader Board Editor.
Descent 3 by Outrage Entertainment
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A Editor for Minecraft NBT files
Gem Dash aka Boulder or Dyna Blaster like 8-bit style game in Python
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)