- Home: https://ioquake3.org/
- Inspiration: Quake III Arena
- State: mature
- Download: https://ioquake3.org/get-it/
- Platform: Windows, Linux, macOS
- Keyword: action, game engine, remake, content original required, shooter
- Code repository: https://github.com/ioquake/ioq3.git (@created 2012, @stars 1840, @forks 439)
- Code language: C
- Code license: GPL-2.0
- Code dependency: SDL2
- Developer: Anthony Pesch, cmf028, Dominic Fandrey, Ensiform, Eugene C., hairball, Jack Slater, James Canete, Jeremiah Sypult, Ludwig Nussel, MAN-AT-ARMS, Mickaël Thomas, Pan7, Richard Allen, Ryan C. Gordon, Simon McVittie, Thilo Schulz, Thomas Köppe, Tim Angus, ToKu, Tom Kidd, Tony White, Zack Middleton
- Build system: Make