This movie started out decent. Some people crash-landed on a strange planet and have to discover both the mysteries of the planet and the mysteries of their partners. This leads to some exciting moments, either by unexpected characters or unexpected alien behaviour.

Unfortunately, halfway through the movie, everything gets explained. Now you know who the bad guys are, and what's wrong with the alien planet. Because of this, the tension is gone and the movie ends in a very slow pace, where you can already predict most of what's going to happen. Too bad..

Can't really recommend this, because it's nothing special. The build-up of the story is nice, Riddick is an interesting character (although you don't learn too much about him), the acting is okay, unfortunately it turns into a very generic movie halfway. It did make me curious about the sequel though, so it must have done something right.