(Sorry for the nutty font / size -- thats what I get for cutting and pasting)
What Dom3 did for TBS games featuring monkeys and Cthulhu, and Dwarf Fortress did for ASCII-style dwarf lava engineering simulations, Depths of Peril does for diplomacy-based barbarian village simulator Diablo clones.
Which is another way of saying, "buy this game". Or at least check out the demo.
http://www.soldak.com/content/blogcategory/17/30/
The graphics are, uh, not good. But they certainly can at least hang with Dom 3, and are actually graphics, compared to DF. The interface is surprisingly usable for an indy game of this ilk, and it has an integrated (if a bit unwieldy) tutorial.
But the gameplay is totally awesome, at least a few hours in. Basically it's kind of Diablo. Only you are the head of a barbarian faction ("covenant:") in this town, and you're competing with the other factions by doing quests and recruiting allies faster than they can. You can just declare war on them and gank them while they are questing, just a like a real MMO. Or raid their clan home. Or forge alliances with other covenants and set up trade routes, etc. On top of all of this it's a full fledged Diablo style RPG with skill trees, tons of inventory, merchants, quests, 4 classes, etc.
The quests are largely randomly generated (there is a story line you can do as well) but they seem to have consequences in the world, though I haven't seen a whole lot of that yet. Like if you fail to kill a big bad guy he raises an army.
So basically you play for a while and eventually wipe out the other clans, then start a new game (but all your stuff carries over). Same thing if you get wiped out by the other covenants.