Godot Engine – Multi-platform 2D and 3D game engine

Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies

The Magic Mask for Android

An open-source user mode debugger for Windows. Optimized for reverse engineering and malware analysis.

The Serenity Operating System 🐞

Powerful yet simple to use screenshot software 🖥️ 📸

Compatibility tool for Steam Play based on Wine and additional components

Atmosphère is a work-in-progress customized firmware for the Nintendo Switch.

DOOM Open Source Release

Vulkan-based implementation of D3D8, 9, 10 and 11 for Linux / Wine

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Luanti (formerly Minetest) is an open source voxel game-creation platform with easy modding and game creation

Compatibility tool for Steam Play based on Wine and additional components

Anbox is a container-based approach to boot a full Android system on a regular GNU/Linux system

Xbox 360 Emulator Research Project

Classic Shell Reborn.

An open source VR headset with SteamVR supports for $200

OpenMW is an open-source open-world RPG game engine that supports playing Morrowind. Main repo and issue tracker can be found here: https://gitlab.com/OpenMW/openmw/

Doom 3 BFG Edition

Written in C++ and using SDL, The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox, it simulates air pressure and velocity as well as heat.

The code base of supertuxkart

Doom 3 GPL source release

A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once

A fast, small, safe, gradually typed embeddable scripting language derived from Lua

Play Oculus-exclusive games on the HTC Vive or Valve Index, scroll down for downloads and installation instructions.

Decompilation of 3D Pinball for Windows – Space Cadet

DS emulator, sorta

DSi Menu replacement for DS/DSi/3DS/2DS

The original source code of Microsoft GW-BASIC from 1983

Doom 3 GPL source release