Sacred Haven of Debauchery

Basically, we need a mix of Fallout, Diablo, and BG/Icewind Dale/Neverwinter Nights. And games in the 3rd and 1st person should remain for single-player experiences; they work better that way. I remember taking an elf fan with me in Oblivion. Every time we fought, he would run off to who knows where, and some of the mobs would follow him. Once, I found him on the rocks near a waterfall. Poor guy fell to his death.