Open Source and alike Games

The open source gaming scene features a lot of amazing projects, but it is like a mess in a jungle. This article aims to provide a curated list of interesting games, so you have actually more time playing them.

Some developers let you access the source code, which means you can inspect, modify and possibly even compile your own version of it, if you desire so. Unfortunately many of them are very rough on their edges, abandoned or the online modes lack the needed player base to have fun. My goal is to help you finding the gems. For this matter, I searched the web and other lists, read about them, watched videos and decided if they belong to this place or not. I did not play most of them and cannot judge their quality. That is your job.

Windows users can often find an installer in the download section on the official websites. Sometimes ready to go binaries for Linux are also provided, otherwise the repository of their distribution have it or various other places.

Btw, this is part two and a follow up to my previous article Open Source DRM-Free Games. Make sure to check it out, if you didn’t already so.

What is included?

True liberal Open Source is usually defined by the Open Source Initiative (OSI). Not all projects here are strictly conform to it, in example sometimes the game assets and art files fall under a proprietary license, but are needed for compiling. This is not to be confused with the ports and rewrites of engines, to make the original (closed source) games be playable on modern hardware, which are summarized below in a separate list. Also, unfortunately some projects do not offer a Linux build. I don’t know if they are all playable through any compatibility layer or can be easily compiled by yourself.

Games and Engines


A little compact list out of all titles from both listings. The links point directly to their websites: Annex: Conquer the World, Bos Wars, Colossal Cave Adventure, Cube 2: Sauerbraten, Duck Marines, Dust Racing 2D, DXX-Rebirth, Flare: Empyrean Campaign, FreeCol, FreeOrion, GCompris, Hurrican, Julius, Kobo Deluxe, Liero, Lugaru, M.A.R.S. a ridiculous shooter, Mindustry, NXEngine Evo, OpenClonk, OpenDungeons, OpenJK, OpenMW, OpenRA, OpenRCT2, OpenTTD, OpenTyrian, osu!, Remnants of the Precursors, ScummVM, Shattered Pixel Dungeon, Solarus, Sonic Robo Blast 2, TVTower, Unknown Horizons, Unvanquished, Valyria Tear, VVVVVV, Zelda Classic, ZDOOM

30 Games

Pong at the National Videogame Museum

We have projects which are inspired by famous franchises and therefore very similar to them, but with their own take on the formula. Then there are even exact replicas in a new game engine, but without the need of proprietary game files. We even have some formerly full commercial proprietary products, of which the code was opened up and given to the community. Off course there are also plenty of other developers starting unique projects, with an entirely new experience too.

Annex: Conquer the World

Genre: Classic top down RTS

Similar To: Glest, Warcraft

Bos Wars

Genre: Classic top down RTS

Similar To: Command & Conquer

Colossal Cave Adventure / Open Adventure

Genre: 70’s interactive text adventure

Similar To: Wander

Cube 2: Sauerbraten

Genre: Multiplayer arena FPS

Similar To: Quake, Unreal

Duck Marines

Genre: Multiplayer action and puzzle

Similar To: ChuChu Rocket

Dust Racing 2D

Genre: Top down racing

Similar To: Super Cars, Skidmarks

Flare: Empyrean Campaign

Genre: Isometric hack & slash action RPG

Similar To: Diablo


Genre: Turn based strategy

Similar To: Colonization, Civilization


Genre: Turn based 4X strategy

Similar To: Master of Orion


Genre: Educational software suite for kids

Similar To: –


Genre: Side scrolling run & gun

Similar To: Turrican

Kobo Deluxe

Genre: Multi directional bullet hell shmup

Similar To: XKobo


Genre: Realtime tactical artillery 1vs1 combat

Similar To: Teeworlds


Genre: 3D beat’em up brawler

Similar To: Overgrowth

M.A.R.S. a ridiculous shooter

Genre: Single screen multiplayer combat shmup

Similar To: –


Genre: Sandbox tower defense

Similar To: –


Genre: Platform sandbox / action adventure

Similar To: Terraria


Genre: Dungeon building and management strategy

Similar To: Dungeon Keeper


Genre: Vertical arcade shmup

Similar To: –


Genre: Rhythm reaction clicker

Similar To: Osu! Tatakae! Ouendan

Remnants of the Precursors

Genre: Turn based 4X strategy

Similar To: Master of Orion

Shattered Pixel Dungeon

Genre: Turn based roguelike RPG

Similar To: Dungeon Crawl Stone Soup

Solarus Editor / Zelda: Mystery of Solarus DX

Genre: Action RPG editor / game engine

Similar To: Zelda A Link to the Past

SRB2 / Sonic Robo Blast 2

Genre: 3D Jump & Run platformer

Similar To: –

TVTower / TVGigant

Genre: Business manager/simulation

Similar To: MAD TV

Unknown Horizons

Genre: RTS Colony building and management

Similar To: OpenAnno, Anno 1602


Genre: Multiplayer team FPS with strategy

Similar To: Tremulous, Natural Selection

Valyria Tear

Genre: 2D J-RPG

Similar To: –


Genre: Precision platformer

Similar To: –

Zelda Classic

Genre: Engine and editor / Action adventure

Similar To: Legend of Zelda

10 Ports and reimplementations – original game copy required

DOOM Builder 2

In this category we have complete new rewrites of existing proprietary engines, to make them playable on modern hardware and other operating systems, or even to extend their capabilities. It is still the same, as the original files are used and needed to play. Usually you can buy the original game without a DRM on platforms like for a small fee. A few engines have an active community around it, creating awesome new mods and adventures for free; definitely check out ZDOOM for that matter.


Genre: FPS / Shoot’em up

Original: Descent 1 and 2


Genre: City building and management strategy

Original: Caesar 3

NXEngine Evo

Genre: Metroidvania / Platformer

Original: Cave Story

OpenJK / Open Jedi Knight

Genre: FPS and 3rd person adventure

Original: Jedi Academy and Jedi Outcast


Genre: 3rd person action RPG

Original: The Elder Scrolls III: Morrowind


Genre: Classic RTS

Original: Command & Conquer, Dune 200


Genre: Construction and management

Original: RollerCoaster Tycoon 2


Genre: Construction and management

Original: Transport Tycoon Deluxe


Genre: Point & click adventures and RPGs

Original: Over 250 games


Genre: Classic FPS / Engine

Original: DOOM, Hexen

Photo by Ojo Toluwashe on

Honorable Mentions

Because we cannot get enough, here are some more games to explore. These are not worse or whatever, there are just various reasons why I did not include them in above list.

  • Block Attack – Rise of the Blocks: Nice Tetris Attack inspired clone.
  • Extreme Tux Racer: Early Linux racing game against the time.
  • freeablo: Reimplementation of Diablo 1 engine, needs original game.
  • Hale: A turn based tactical combat RPG.
  • Magarena: A fantasy card game to play against a computer ai.
  • Mr. Rescue: Oldschool looking arcade styled rescue action.
  • OpenBOR: Engine to create and play beat’em ups similar to Street of Rage.
  • OpenHexagon: Clone of Super Hexagon, but with a level editor.
  • Ri-li: Control a cute toy wood engine to collect items in a single screen window.
  • rRootage: Vertical bullet hell shooter for Windows mainly boss battles.
  • Super Space Invader: A short modern take on the Space Invaders arcade game.
  • SuperStarfighter: Multiplayer couch co-op arcade combat.
  • Tanks of Freedom: Turn based combat strategy game like Advance Wars.
  • The Bub’s Brothers: Clone of Bubble Bobble with up to 10 players.
  • Trigger Rally: Arcade style 3D rally racing game.
  • UFO: Alien Invasion: New game based on UFO: Enemy Unknown, needs original game.
  • VCMI Engine: Reimplementation of Might and Magic 3 engine, needs original game.
  • vitetris: Terminal based Tetris clone.
  • Word War vi: 80’s style horizontal shmup similar to Defender or Stargate.
  • YSoccer: Very similar to the old top down perspective Sensible Soccer series.

I hope you had a good ride into the open source world and found some interesting and new projects to tinker with. If everything provided on this article is not enough for you or you are missing a known title, then checkout my previous article in Open Source DRM-Free Games.


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