There are 2 repositories under game-port topic.
Open source game engine for Baba Is You puzzle game
A gameboy port of the game Minesweeper
Convert a USB HID device (joystick, gamepad) into a Gameport joystick with the power of arduino :-)
A template for a game in the C programming language that can be compiled to web and native targets from the same codebase.
Simulate a case-insensitive filesystem with symlinks
Darkest Dungeon port in Unity. Almost completely identical to the original. Platforms: PC/Android.