NetHack

If you're more a fan of game play than graphics and you like games that need you to explore and think and explore some more, then NetHack could be a game for you! Filled with far too many different weapons, potions, creatures, tools, clothes and ascii characters NetHack is probably impossible to complete, but very fun to die trying. You have a choice of thirteen different rolls (Wizard, Archeologist, Tourist, Knight, ...) in five different races which all play very differently from each other. Admittedly learning the keys takes a few games, but you can see a list of the keys by pressing '?'. I've been informed that there are a lot of spoilers on the web, but have been quite content playing the game for the last two weeks without looking beyond the guidebook text file it comes with. NetHack generates a new world each time a new game is started - so no two games are ever the same.