Base Defense is a single/cooperative modification based on horde-style and RPG systems. It's awesome, you should try it ;)
I loooove the mod base defense, so much so that i decided to mod that. Kinda. This mod has 4 custom tracks (from doom4) added into Base Defense. I really have nothing to say here, info is in the readme file, blah blah blah, like and subscribe.
This mod is merely a music pack, nothing else.
4 custom soundtracks from doom 4.
I hope you like it, i kinda do.