WADs in Doom 2, ZANDRONUM
Satans Covenant Invasion
A 30 map invasion wad that takes place in hell. Although the wad is hell themed, there are a few maps based on earth and tech bases. Basically the story story goes that after the invasion of earth and various human planets, the humans have finally found a way to get to hell to get some pay back for all the damage hell has done to them. Your job is to find satan and make him pay for his crimes vs humanity.