The powered-by-the-apocalypse engine sounds fantastic. Indeed as I read your comment I was thinking that one might want to repurpose the D&D combat engine to something more psychological, but the direction of the Apocalypse World engine sounds more interesting (and maybe profound) than anything I was expecting.
Dungeon World [0] is a hack/slash dungeon delving fantasy game using the AW engine. Fantasy isn't my bag, so I haven't played it. But it gets good reports. It won Indie RPG of the year, too.
