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Game · Action & shooters

ioquake3

Free and open-source Quake 3 based engine.

  • Completely free
  • Linux
  • Open source

Overview

ioquake3 is a first-person shooter, available on Linux.

Gameplay elements described in its GitHub repository: mod support.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “ioquake3 is a free and open-source software first person shooter engine based on the Quake 3:” — Flathub, 10 November 2026
  • “ioquake3 is a free and open-source software first person shooter engine based on the Quake 3:” — Flathub, 10 November 2026
  • “The intent of this project is to provide a baseline engine which may be used for further development and to play _Quake 3: Arena,_ _Team Arena,_ and mods.” — GitHub, 10 November 2026

At a glance

All of ioquake3 is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

ioquake3 is a free and open-source software first person shooter engine based on the Quake 3: Arena and Quake 3: Team Arena source code. The source code is licensed under the GPL version 2, and was first released under that license by id software on August 20th, 2005. Since then, our dedicated team has been working hard to improve it, fixing bugs, and adding just the right new features to make the engine even better than before.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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