// Games

Licenses and source code

Every game here may be shared freely. Where a game was changed to run in the browser, the complete source code of that version, our patch and the build instructions, is published next to the game, as the licenses (for example the GNU GPL) require.

The CC0 license of the Grab3D model library does not apply to the games. Each game keeps its own license.

Terms of use

  • Tyrian: The Tyrian game data are freeware for free play and sharing. Commercial use is not permitted.
  • Micropolis: Micropolis is a registered trademark of Micropolis Corporation (Micropolis GmbH) and is licensed here as a courtesy of the owner under the Micropolis Public Name License, for non-commercial use only. No trademark rights of Electronic Arts are granted.Modified versions must be marked as such and must not be presented as the original program (additional terms of Electronic Arts).
  • Hurrican: Free use only: no money may be charged for the game. Commercial use of the assets needs the author's permission.

Abuse

Code
Original code public domain, SDL port layer GNU GPL v2 or later
Game data
Public domain (Crack dot Com), sound effects CC0 replacements

The original Abuse source code and most game data were released into the public domain by Crack dot Com. The SDL port layer, and therefore this web version, is licensed under the GNU GPL v2 or later. The build is based on the Xenoveritas fork. The sound effects are free CC0 replacements from Kenney.nl, OpenGameArt.org and procedural sounds. No original Abuse sounds or music are included.

Original game by Crack dot Com (1995). SDL port by the Abuse community, base: the Xenoveritas fork.

Source code of the web version

Original project

Game page: Abuse

Warzone 2100 4.7.0

Code
GNU GPL v2 or later
Game data
GPL v2 or later including music and videos, some files CC BY-SA 3.0, CC0, MIT, BSD, OFL 1.1

Warzone 2100 is free software. Source code and game data, including the music and the campaign videos, are licensed under the GNU GPL v2 or later, with individual files under other free licenses (see COPYING.NONGPL). The Warzone 2100 Project permits the use of the name, logos and story texts. This build was compiled from the official 4.7.0 release with a web patch for screen layout, touch hooks and savegame access. The game logic is unchanged.

Original game by Pumpkin Studios (1999). Developed as open source by the Warzone 2100 Project and its community.

Source code of the web version

Original project

Game page: Warzone 2100

Tyrian (OpenTyrian) 2.1

Code
OpenTyrian engine: GNU GPL v2 or later
Game data
Tyrian 2.1 game data: freeware (© Eclipse Software, Epic MegaGames)

The OpenTyrian engine is free software under the GNU GPL v2 or later. This version is compiled from OpenTyrian v2.1.20260913 with our web patch, the complete corresponding source is published with the game. The game data are the Tyrian 2.1 freeware files (© 1995 Eclipse Software and Epic MegaGames), made freeware by Jason Emery in 2004 with the words: Feel free to play it all you want and share it with friends. Graphics by Daniel Cook, music by Alexander Brandon. The data are included unchanged and offered free of charge. The web build also contains SDL2 (zlib license) and the Emscripten runtime (MIT).

Developed by Eclipse Software, published by Epic MegaGames (1995). Graphics by Daniel Cook, music by Alexander Brandon. OpenTyrian by its contributors.

Source code of the web version

Original project

Game page: Tyrian

Flare 1.15

Code
GNU GPL v3 or later
Game data
CC BY-SA 3.0, fonts SIL OFL 1.1

Flare is free software. The engine (© Clint Bellanger, Justin Jacobs and contributors) is licensed under the GNU GPL v3 or later, the art and data (fantasycore and Alpha Demo, © Clint Bellanger and contributors) under CC BY-SA 3.0, the fonts under the SIL Open Font License 1.1. This edition was built from the official Flare 1.15 sources plus our WebAssembly changes. Changes to the art and data (shared alike under CC BY-SA 3.0): images re-encoded to WebP, music re-encoded to Ogg Vorbis at a lower bit rate, Chinese, Japanese and Korean fonts and languages left out, the missing game over background filled in with the existing dialog frame, web default settings added.

Flare by Clint Bellanger, Justin Jacobs and contributors. Art and data by Clint Bellanger and contributors.

Source code of the web version

Original project

Game page: Flare

OpenTTD 15.3

Code
GNU GPL v2
Game data
OpenGFX (GPL v2), OpenSFX (CC BY-SA 3.0), OpenMSX (GPL v2)

OpenTTD is free software under the GNU GPL v2. This build was compiled from the official OpenTTD 15.3 sources with a small web patch. It bundles the free base sets OpenGFX (GPL v2), OpenSFX (CC BY-SA 3.0) and OpenMSX (GPL v2). The music recordings were rendered from the OpenMSX MIDI files with the GeneralUser GS SoundFont by S. Christian Collins and are GPL v2 like the compositions.

OpenTTD by the OpenTTD team and contributors. Base sets OpenGFX, OpenSFX and OpenMSX by their authors.

Source code of the web version

Original project

Game page: OpenTTD

Micropolis

Code
GNU GPL v3 with additional terms by Electronic Arts
Game data
Original cities, scenarios, graphics and sounds of the 2008 GPL release (GPL v3)

Micropolis, Unix Version. Copyright © 1989 to 2007 Electronic Arts Inc. Free software under the GNU GPL v3 with additional terms. This is a modified version by Grab3D, not the original program, and it is not affiliated with Electronic Arts. It was built from the official MicropolisCore sources and the original 2008 GPL release (cities, scenarios, graphics, sounds) with a web patch. The new web interface is GPL v3 as well.

Designed by Will Wright. Original code © 1989 to 2007 Electronic Arts Inc. MicropolisCore by Don Hopkins.

Source code of the web version

Original project

Game page: Micropolis

Hurrican 1.0.9.3

Code
MIT (community SDL port), free use without charge
Game data
Freeware by Poke53280, free to port and share without charge

Hurrican is freeware by Poke53280 (Jörg M. Winterstein). With the public source release the author allows the code and all game assets to be modified, ported and released as long as no money is charged for it. The community SDL port states that the original source files are under the MIT license. This browser version is free of charge, contains the original game content and was compiled from the community source 1.0.9.3 with our web patch. The web build also contains SDL2, SDL2_image and SDL2_mixer (zlib license), libpng, zlib, libogg and libvorbis (BSD license), libmodplug (public domain) and GLM (MIT license).

Game by Poke53280 (2007). Community SDL port by the HurricanGame project.

Source code of the web version

Original project

Game page: Hurrican

Jetstorm (OpenSoldat remake)

Code
MIT (OpenSoldat and this remake)
Game data
OpenSoldat base 0.4 by the OpenSoldat contributors, CC BY 4.0

The game logic of Jetstorm (physics, soldiers, weapons, bullets, objects, bot AI, map format) is a translation of the OpenSoldat source code from FreePascal to TypeScript. Rendering, input, audio, menus and the remaster effects are new code. All of it is released under the MIT license, Copyright 2020 Transhuman Design (OpenSoldat) and Copyright 2026 Grab3D (TypeScript remake). Maps, textures, scenery, soldier and weapon graphics, particles, animations, skeletons, sounds and bot profiles are taken from "OpenSoldat base" version 0.4 by the OpenSoldat contributors (Transhuman Design and community), licensed under Creative Commons Attribution 4.0 International (CC BY 4.0). Changes: images packed into a texture atlas, some images downscaled, map textures resized to power of two sizes, colour keys converted to transparency, sounds converted to 16 bit PCM, animations and skeletons bundled into one data file, map previews rendered from the maps, medical kit redrawn with a heart instead of the red cross, emblem removed from the infiltration flag, smoke puffs redrawn round, weapon names replaced by generic names, two bot names changed. Soldat is the original game by Michał Marcinkowski. Jetstorm is a working title, the remake is not affiliated with or endorsed by Transhuman Design or the OpenSoldat project. Fonts: Inter, Space Grotesk and JetBrains Mono (SIL Open Font License 1.1).

Original game Soldat by Michał Marcinkowski (2002). OpenSoldat code by Transhuman Design, maps, graphics and sounds by the OpenSoldat contributors. Browser remake by Grab3D.

Source code of the web version

Original project

Game page: Jetstorm

Freedoom: Phase 1 and Phase 2 0.13.0

Code
dsda-doom engine: GNU GPL v2 or later
Game data
Freedoom 0.13.0 by the Freedoom project, BSD 3-Clause

Freedoom: Phase 1 and Phase 2, version 0.13.0, Copyright © 2001 to 2024 contributors to the Freedoom project, licensed under the BSD 3-Clause license. The game data are served unchanged. The engine is dsda-doom v0.30.0 by the dsda-doom contributors, based on PrBoom+, free software under the GNU GPL v2 or later. It contains Nuked OPL3 (GNU LGPL 2.1 or later) for the music. This version was compiled with Emscripten and our web patch, the complete corresponding source is published with the game. The SC-55 sound font of dsda-doom is not included. Freedoom is an independent project and is not affiliated with or endorsed by id Software or Bethesda. Fonts of the start screen: Inter, Space Grotesk and JetBrains Mono (SIL Open Font License 1.1).

Freedoom by the contributors to the Freedoom project. Engine dsda-doom by the dsda-doom contributors, based on PrBoom+ and the Doom source code release of 1997. Browser version by Grab3D.

Source code of the web version

Original project

Game page: Freedoom

Libraries in the WebAssembly builds

The browser versions are compiled with Emscripten 4.0.10 and contain, depending on the game, SDL2, SDL2_image, SDL2_mixer, SDL2_ttf (zlib license), libpng, zlib, libogg and libvorbis (BSD), FreeType (FreeType License), HarfBuzz (MIT), libwebp (BSD), libmodplug (public domain), GLM (MIT) and Nuked OPL3 (LGPL 2.1 or later). The build instructions of each game list them in detail.

Names and trademarks

Game names are used only to identify the respective free games. All trademarks belong to their owners. Grab3D is not affiliated with the original developers or publishers.

Micropolis is a registered trademark of Micropolis Corporation (Micropolis GmbH) and is licensed here as a courtesy of the owner under the Micropolis Public Name License. micropolis.com

SimCity is a trademark of Electronic Arts. The Micropolis license grants no right to it, and this project is not affiliated with or endorsed by Electronic Arts.

Freedoom is an independent free game by the Freedoom project. It is not affiliated with or endorsed by id Software, ZeniMax or Bethesda, and none of their game data are used.

Screenshots and this website

The screenshots show the games' own, freely licensed content and are subject to the licenses of the respective game data listed above.