Heroes and Castles is the latest game from the guys at Foursaken Media (who, I believe, I first met up with at Macworld around this time last year). It's a little bit more involved than anything else I've seen them do -- on the surface, I'd probably compare it most to the great Dungeon Defenders, a really excellent game on iOS or Steam that you should check out if you haven't yet.
Heroes and Castles isn't quite as well-polished as Dungeon Defenders, but it is a lot of fun. It's a third-person action game, where you play as a fantasy character