GOG are running a big fat 75% off promo on a number of Square Enix classics. You can get the likes of Anachronox, Hitman, and Soul Reaver for just 99p, with Deus Ex, Thief, and Tomb Raider 1-3 all going for £1.59 each.
Hell, even Daikatana is worth the 99p just to see exactly how John Romero failed to make everyone his bitches. Maybe. Oh 90s advertising, how terrible you were.