johnnyjeans parent
Any particular year?
Quake III Arena was released in 1999. It was open-sourced in 2005.
https://github.com/id-Software/Quake-III-Arena
https://en.wikipedia.org/wiki/Id_Tech_3
(from the source release you can see benreesman remembered right: it was lcc)
Id Tech 3 was great, gave us a lot of forks.
Yeah, my favorite Q3 engine game was Jedi Outcast (the engine must have been licensed, since the game was released before 2005, when it was open sourced)