Dungeons of Dredmor is a Rogue-like, but not an ASCII game. That is, in addition to a tileset, its UI is mouse-based rather than based on command keys, which may make it accessible to the less geeky. Like all Rogue-likes, it still offers algorithmically generated levels, monsters, treasure, and the like, with the concomitant virtues and difficulties that this entails: there's enormous variety of encounter, with no two games alike, but you can often find yourself in no-win situations, and this is a game with permadeath.
As with other Rogue-likes, you need a cheerful attitude of embracing your many losses to play, but of course many of the deaths you will experience are humorous.
Rather than a multitude of races and classes, Dredmor has a skill system that pretty much allows you to create your own quasi-class. It also has a richer and more complex crafting system than I've seen before in a Rogue-like.
The writing, such as it is, is quite funny; one of the gods you may sacrifice to, for instance, is the God of Lutefisk, to whom you sacrifice, naturally, lutefisk, a fairly common treasure drop. Booze provides manna, and food restores health. There isn't, however, quite the crazed level of fiddly detail that you get in long-developed Rogue-likes such as NetHack or Crawl, things like tossing rings down sinks to identify them by the sound they make.
Still, it's pleasant, cheerful, and entertaining, and at five bucks, a pretty cheap gaming fix. Steam offers Mac and PC versions; I've seen mention of a Linux version, but can't find a vendor for it, but perhaps Gaslamp will find a way to offer that in future.