Progress Quest is a throwback to classic MUD and text-based RPGs, boasting heaps of cutting-edge text-based graphics, hundreds of hours of play time, hundreds of quests, divided into at least 4 Acts, dozens of character races and classes, and tons and tons of enemies and gear available. The game is ridiculously complicated but the UI is incredibly simple, with a fully automated interface allowing for an extremely streamlined gameplay experience. I've put in roughly 20 hours on my main character. His name is Crebiev, and he is a Bastard Lunatic Dung Elf. I've reached level 9 and still have quite a way to go. The game manual can be found here: http://progressquest.com/info.php It's well worth a read *after* you start your game. It is 100% free and can be played either in a browser or downloaded to run on your desktop. Go forth! Kill Monsters! Level Up! Watch Progress Bars!
Progress Quest got me through a lot of papers in college. For those looking for something equally sarcastic but with a little more game: http://hamumu.com/game.php?game=NPC All the management of a dungeon crawler, none of the crawling