Open-source alternatives to Assaultcube AC

GZDoom is a feature centric port for all Doom engine games, based on ZDoom, adding an OpenGL renderer and powerful scripting capabilities

Darkest Hour: Europe '44-'45

Unreal Engine 1 Reimplementation

Doom 64 Reverse Engineering By GEC

Freedoom is an entirely free software game based on the Doom engine.

Official bug tracker for the game Urban Terror 4.x - www.urbanterror.info

This is the official GitHub mirror for the FTEQW project.

:video_game: Open Source teleportation based first person puzzle-platformer

A purist Quake source port that restores the original look and feel of v1.09 and earlier.

This project is a first-person shooter game engine and a pseudo-3D rendering engine written in C. It serves as a software framework for rendering three-dimensional environments and managing entity physics. The engine includes a networked multiplayer system designed to synchronize game state and player actions across a client-server network. It utilizes a portable codebase that allows game logic to be adapted across different operating systems and hardware architectures. Core capabilities cover 3D game engine architecture, including spatial partitioning and depth-based rendering. The system a

This repository contains the C++ game source code for a single-player first-person shooter action game. It is a software implementation of the Id Tech 4 engine, designed for 3D rendering with a focus on real-time unified lighting and geometry. The project enables the modification of core engine logic and rendering systems. It serves as a resource for classic game engine modification, first-person shooter development, and retro game preservation. The engine utilizes a unified shader pipeline and stencil shadow volumes for lighting effects, alongside BSP tree spatial partitioning for visibilit

This is the original C source code for the Quake game engine, a landmark first-person shooter engine from the 1990s. It is a retro game engine that renders 3D environments and processes player input in real time using CPU-based software rendering rather than GPU acceleration. The engine supports networked multiplayer gameplay over LAN or internet connections and is designed to be moddable, allowing users to create and run custom game modifications and levels. The engine's architecture includes a Binary Space Partition tree for efficient world geometry organization and visibility determination

Quake-2 is a game engine designed for the development of first-person shooters and the rendering of three-dimensional environments. It provides the core framework for processing real-time physics and player input within interactive 3D spaces. The engine supports software extensibility, allowing for the direct modification of source code to change gameplay mechanics and engine behaviors. This makes it a resource for retro game engineering and the study of early 3D development techniques. Its technical capabilities include vertex-based software rendering, BSP-tree spatial partitioning, and PVS

The original open source release of Wolfenstein 3D

The ioquake3 community effort to continue supporting/developing id's Quake III Arena

Port of the 3D Realms game "Duke Nukem 3D"

Descent 3 by Outrage Entertainment

BananaBread is a C++ 3D game engine that runs on the web using JavaScript+WebGL+HTML

Wolf4SDL is an open-source port of id Software's classic first-person shooter Wolfenstein 3D to the cross-platform multimedia library SDL. It is meant to keep the original feel while taking advantage of some improvements.

Fork of the original AvP port for Linux, expanded with multiplayer and other features

Reverse-engineered ports of Build games using EDuke32 engine technology and development principles (NBlood/Rednukem/PCExhumed)

Call of Duty: Zombies demake, powered by various Quake sourceports. https://docs.nzp.gay/