Descent: Journeys in the Dark

Descent is FFG's answer to Heroquest, so that makes it a dungeoncrawl game. For good or ill, it's a much slower, more complicated version, basically 4e without the illusion of being a RPG.

Still, it can be fun if you have 5 hours or more to play, but if you have that kind of time to play fantasy characters bashing monsters in dungeon for phat lewt, why not just play a RPG?