On Steam for a limited time is the full QuakeCon bundle pack with many id Software and Bethesda games. These include Elder Scrolls 3 and 4 GOTY, ALL Quake games, all HeXen games, all DOOM games, Fallout 3 GOTY edition, all Wolfenstein games and several others (check the link).
Frankly for 50 quid this is literally months of cracking entertainment, each of Bethesda's offerings you can sink 100+ hours EACH, plus put all the Quake, Doom and Wolfensteins as well? Gaming sorted for practically your whole life.
Apologies if it is a repost.