The castle

"This is a remaster of my first serious wad. You have low resourses and to pass the level you have to kill all monsters."

Things you need:

Zandronum: https://zandronum.com/download

-doom2.wad: https://store.steampowered.com/app/2280/DOOM__DOOM_II/

-(In case you dont want to pay Doom2)freedoom2 : https://freedoom.github.io/download.html