The latest Humble Bundle is a good one, with the Staff Picks bundle including a selection of quality titles. Starting in the lowest tier you can get Volume, TIS-100, and Legend of Grimlock for next to nothing. You can then upgrade and bag Infinifactory, The Secret World, and Dungeons 2, and finally paying $14 gets you all that and the atmospheric ARPG, Grim Dawn. Not too shabby if you ask us.