https://github.com/yquake2/xatrix
https://github.com/yquake2/rogue

Ok thx for replay but is this a official source code?

The READMEs on both projects start with "This is a bugfixed version of id Software's Quake II missionpack..."

If you are after the original unmodified code then you can find source dumps here: ftp://ftp.gamers.org/pub/idgames/idstuff/quake2/source/ - ftp.idsoftware.com may be gone but the mirrors are still alive.

Not sure if the mission packs were ever GPLd though (the fact that they aren’t on the Id github page suggests not) so maybe only under the original mod license.