The source code to VVVVVV! http://thelettervsixtim.es/

Experimental C# Playstation Emulator

javascript doom map editor

Delver game engine and editor

This is the source code to various utilities written by id Software and used during the development of Doom.

A TypeScript chess library for chess move generation/validation, piece placement/movement, and check/checkmate/draw detection

Dicey Dungeons

Level design tools for Unity

C# Scripting via MCS

An edit-time .WAD parser/importer for Unity

Realtime-CSG, CSG level editor for Unity

File I/O for video games

Easily build blueprints which can be imported into Factorio

Comprehensive map editor for Doom, Heretic, Hexen and Strife based games mainly geared towards GZDoom source port. Based on Doom Builder 2 by CodeImp (http://www.doombuilder.com/).

D**m, the Roguelike

Backport of Jaguar Doom to the PC

GZDoom-GPL is a GPL-compliant fork of GZDoom.

macOS build environment for SLADE Doom Editor

Cross-Platform Level Editor

a generative noise label bot

A command-line VST plugin host

Flexible level editor

Cross-platform desktop, mobile, and WebGL game engine, based on FlashPunk

Haxegon + Puzzlescript = Zeedonk!

No longer under development

HTML5/WebGL source port of Quake

alpha - deprecated 2015~2016. unrelated to the new engine! view the new engine here - https://luxeengine.com/

A utility for creating WAD, ZIP (PK3) and 7Z (PK7) archives for Doom using the power of Lua.

The classic, refined DOOM source port. For Windows PC.