BYOC (Bring Your Own Class) is a modification for Doom 2 that aims to collaborate creators from a private community to have them Bring Yheir Own Classes in ZDoom derivative sourceports like: Zandronum. While it's made for online, Co-op play, this can be played offline as well.

In the mod there will be both well known characters that you know and love (e.g. Doomguy from Doom, Dr. Doomguy from Dr. Doom, Peppino from Pizza Tower, Heavy from TF2, Serious Sam from Serious Sam, Sir Dan from Medievil, Quote from Cave Story and PTG from PTG) and some original author created characters!