An ascii based adventure game, with an overhead perspective. Monsters are represented by letters and the player by a @. There are mods available with graphical perspectives.
Your goal is to grab as much treasure as you can, retrieve the Amulet of Yendor, and escape the Mazes of Menace alive. Your abilities and strengths for dealing with the hazards of adventure will vary with your background and training: you can play a variety of classes from Archaeologist to Wizard, as well as different races. You can eat defeated (or canned/tinned) monsters for various results. ("I can't believe I ate the whole troll!")