Like a duck in power armour, Dungeons of Dredmor is both silly and very tough. It’s one of the most accessible roguelikes available on the Mac, and it’s instilled with a great sense of humour.
As with most roguelikes, you generate a character who adventures through a series of randomly-generated "floors", defeating enemies and avoiding traps in order to gain experience and loot (with which to collect better loot and more experience). And as with most roguelikes, your character will get killed a lot (the so-called permadeath, which means when your character is dead, you have to create a new one, can be disabled here, but this is rather missing the point). It's also turn-based, meaning it's about about thought and planning as opposed to reflexes or actions per minute. Unlike other roguelikes, Dungeons of Dredmor is a completely visual experience (other roguelikes traditionally favour symbols and letters over icons and furnishings).