If the walking around doesn't put you off, a coupla weeks at least. Tomb Raider with a sword. Anyone after a good hack and slash game, and fans of the Might and Magic series.
Collision detection is a bit inaccurate.
Manual is pretty good, informative and useful. Easy to use, but controls are a little off. Nice graphics system, with real-time lighting and shadows. Pretty good plot. It's in the Might and Magic universe.