free fps game design software

First Person Shooters Software

Browse free open source First Person Shooters software and projects for Windows below. Use the toggles on the left to filter open source First Person Shooters software by OS, license, language, programming language, project status, and freshness.

Wellspring for IP Management

For In-house patent counsel or corporate legal counsel in a small to medium-sized company who are managing an IP portfolio.

From pharma to manufacturing, software to hardware, we help companies manage intellectual property, contracts, inventions, & more.
PikMyKid is the first and only safe & smart dismissal solution for school districts, charter/private schools, after-school programs, YMCAs, JCCs, Summer camps, and daycare facilities. It connects schools, teachers, and parents through real-time tools to make dismissals safer and more efficient. PikMyKid schools are able to confidently organize their dismissals with ease and no longer rely on paper notes or tedious phone calls to the front office.
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QuakeSpasm

A modern, cross-platform Quake game engine based on FitzQuake.

QuakeSpasm is a *Nix friendly Quake Engine based on the SDL port of the popular FitzQuake. It includes some new features, important fixes, and aims for portability and 64 bit correctness.
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prboom-plus

Modified PrBoom port with uncapped framerate, variable gamespeed, re-record, walkcam, chasecam, full mouselook, fov and other features without loss of compatibility with original DOOM.
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Aleph One: Marathon Open Source

Aleph One is the open source continuation of Bungie's Marathon 2 FPS game engine. Aleph One plays Marathon, Marathon 2, Marathon Infinity, and 3rd-party content on a wide array of platforms, with (optional) OpenGL rendering, Internet play, Lua scripting, and more.
A Route Management Software to Optimize Your Operations
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BZFlag - Multiplayer 3D Tank Game

OpenSource OpenGL Multiplayer Multiplatform Battle Zone capture the Flag. 3D first person tank game. Download the latest version at https://www.bzflag.org/downloads/ Development has moved to Github: https://github.com/BZFlag-Dev/bzflag (The SourceForge binary releases for Windows and macOS are very outdated. Please download the latest version from our website.)
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Nexuiz

Nexuiz is a multiplayer first-person shooter. It is distributed under the GNU General Public License (GPLv2). Version 1.0 was released on May 31, 2005. The current version is, 2.5.2.
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Metamod Half-Life Utility mod

MetaMod is a plugin/DLL manager that sits between the Half-Life Engine and an HL Game mod, allowing the dynamic loading/unloading of mod-like DLL plugins to add functionality to the HL server or game mod.
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PrBoom

PrBoom, the purest Doom-Port? Aims to be the most stable Doom port with the highest compatibility to the major Doom versions. Highres software and nice OpenGL rendering. Full Boom and most if not all MBF features.
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The Quake Army Knife (QuArK)

A powerful editor for video games based on or similar to id Software's series of Quake games. Currently QuArK supports 41 distinct games, 5 generic game engines, and a countless number of expansions packs, addons, and mods. It integrates a map editor, model editor, archive editors, texture management, and much more.
Far Beyond User Management

Your end-users expect much more than just a login, they expect a full self-service admin experience. We provide that, in 5 lines of code.

Frontegg is a developer platform that enables self-service, security and enterprise-capabilities through a rich user-management interface, freeing up creativity and differentiation.
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Vavoom

Vavoom is Doom/Heretic/Hexen/Strife source port. It features software, OpenGL and Direct3D rendering, VavoomC scripting language, slopes, 3D-floors, Quake style lighting engine, pure client/server architecture with in-game joining and a lots more.
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Doom Legacy

This is one of the most popular Doom source ports. It is available for DOS, Windows, Linux and Mac OS X, and should build on any POSIX platform which supports SDL. It enhances Doom with things like TCP/IP networking, OpenGL renderer, Heretic support and much more.
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Metamod-P

Metamod-P is enhanced version of Metamod. It has dynamic link-entities and automatic detection of Mod DLL and other improvement to allow it work with future Half-Life Engine updates and new Mods and updates. It also has performance optimizations.
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Doomsday Engine

DOOM / Heretic / Hexen source port with enhanced graphics and UI

A portable game engine for classic first person shooters such as DOOM, Heretic and Hexen. Lets you enjoy the original games using modern technology, including high-resolution OpenGL graphics, 3D models, and dynamic lighting effects.
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Doom64 EX

Doom 64 EX is a faithful recreation of the original game using the Doom source code as the base with the benefit from newer control methods like mouse look, high resolutions and color depth.
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Odamex

Odamex is a free, cross-platform, modern client-server Doom engine

Odamex is a free, cross-platform (Mac, Windows, Linux) modification of the Doom engine that allows players to easily join servers dedicated to playing Doom online. The goal of Odamex is to add enhancements to Doom while still retaining that "classic Doom feel" we all know and love about the original game.
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Digital Paint: Paintball 2

Paintball2 is a fast-paced first-person game with capture the flag, elimination, siege, and deathmatch (free-for-all) styles of gameplay. This project focuses on enhancing the Quake2-based engine it uses.
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OpenLieroX

OpenLierox is an extremely addictive realtime worms shoot-em-up backed by an active gamers community. Dozens of levels and mods are available to provide endless gaming pleasure.
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AMX Mod X

AMX Mod X is a Metamod plugin which allows you to write modifications for Half-Life with Small scripting language. It provides in-game administration tools, game statistics, server management and gameplay modificators. It is based on the original AMX Mod
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FreeCS

FreeCS is a free-software reimplementation of Counter-Strike 1.5.

FreeCS is a free-software reimplementation of Counter-Strike 1.5 running on the FTEQW engine. All it is, is a game-logic re-implementation in QuakeC, an architecture independent programming language. FreeCS is not a game-engine as it relies on FTEQW (released under the GPL V2). All this makes it possible to play FreeCS on virtually any platform! No DRM! No third-party accounts! Just download, play, contribute. The game-logic is written by me with help of twhl.info's wiki. It has since been incorporated into the Nuclide project, which re-implements more than just CS 1.5.
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Hammer of Thyrion (uHexen2) is a cross-platform port of Raven Software's Hexen II source. It is based on an older linux port, Anvil of Thyrion. HoT includes countless bug fixes, improved music, sound and video modes, opengl improvements, support for many operating systems and architectures, and documentation among many others.
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ASSAULTCUBE HAS MOVED TO GITHUB: http://www.github.com/assaultcube AssaultCube is a FREE, multiplayer, first-person shooter game, based on the CUBE engine. Taking place in realistic environments, with fast, arcade gameplay, it's addictive and fun! With efficient bandwidth usage, it's low-latency and can even run over a 56Kbps connection. It's tiny too, weighing in at a lightweight 40 MB package available for Windows, Mac and Linux. On the correct settings, it can even run on old hardware (Pentium III and above). More about AssaultCube @ http://assault.cubers.net
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A GUI client application for Downloading Installing and Playing Americas Army 2.5 on Windows, Mac and Linux with a new custom authorization system. On the server side a Desktop server manager for Windows, Mac and Linux and a Command line dedicated server manager for Windows and Linux. Backend server components include a replacement authorization system using the Battletracker account & stats database and a PunkBuster log streaming server which records players possible cheating activities.
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Tremulous

Team based Aliens vs Humans FPS with buildable structures.
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OpenArena

Free and open source FPS based on Quake III Arena

OpenArena aims to be a free, yet compatible clone of Quake III Arena. It also strives to add subtle enhancements such as new gametypes, playermodels and of course maps! Further improvements are incorporated by using the ioquake3 engine.