A Doom 2 mod, compatible with several sourceports (GZDoom skulltag and Zandronum). Featuring 40 weapons, optional hires sprites, offline bots compatibility, custom hud, a "customfolder" and some other stuff.
Download link: Moddb.com
CSDMO Update 3 is near around the corner =P
Update 3 features an optional "Rip and Tear" mode, which allows players to play alternate versions of the weapon without reload and specialized melee/grenade keys.
PS2: I've created some discord groups, just to experiment with it for a bit and see how it goes.
Choose your language and hangout =P