GDI, OpenGL and Direct3D 9 re-implementation of the DirectDraw API
A retro game engine for Python
Java/JavaFX/Kotlin Game Library (Engine)
Open source clone of the Age of Empires II engine
The game engine for everyone
Gameboy emulator in Java 8
Ct.js is a desktop game engine that makes learning programming fun
Open source voxel world
A Minecraft plugin API
Entertaining and interactive game of solving 50+ puzzle pieces
The original Blooket hack
ESP32 Display Controller (VGA, PAL/NTSC Color Composite, SSD1306, ST77
Free Streaming Bot: Compatible with Twitch, YouTube and Facebook
Enigma is a puzzle game
Ten is a fun math puzzle game for all ages.
Good-looking and addictive OpenSource games
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Colonize the New World.
Simple Puzzel Game
Kubok16 is a math puzzle similar to Sudoku.
A very richly featured implementation of the Sokoban puzzle game
Python front end for MAME that can run in Linux, Windows, and MacOS