One of the more infamous obscure spin-offs out there, Brotherhood of Steel was panned by Fallout fans for its simplistic gameplay, which was a far cry from the deep RPG systems that people expected from the series. It was so unpopular in fact, that a planned sequel was canned and the game's storyline ditched by Bethesda from Fallout canon. Ouch! But, dare I say it, Brotherhood of Steel wasn't that bad. It just wasn't really Fallout - more of a Diablo clone in which you blasted and punched your way through post-apocalyptic dungeons. It was all about picking up tons of loot, upgrading your weapons and packing bigger and better armour, all under the guise of 'questing'; which mainly entailed you clearing roomfuls of people and radscorpions for people... to the sound of Slipknot. Sure, it was repetitive, ugly, and decidedly more vulgar than the Fallout we all know and love, but it does have the advantage of letting you play through it with a buddy. Yeah, you don't get that in Fallout 4, do you?