Fantastic package two great games on one disc however i feel there are few things that hold it back game play wise.
In terms of the story i think Riddick is a very interesting charecter and has great back story and depth. i think they cut corners out of convienince in some parts which actualy annoyed me. *minor spoiler!!!!*
The fact that his eyesight is magically given to him is plain old lazy. would it not have made sense to say he was being experimented on. or even better have the doctor who he mentions in Pitch Black perform the surgery on him??
END OF SPOLIER*
The multiplayer is a little tacked on but has some interesting ideas. its great to have an idea of what the guards must feel like right before Riddick comes out the dark and shivs them.lol
Not to stay negative however, this is probably the best movie conversion i've ever played and as a game is better than the majority of other stealth shooters out there. The game play though flawed is very good for the most part. love the stealth kills! The story putting aside the odd niggle is great. The characters are all varied and the guards will crack you up with what they come out with. If the game play had been a updated a tad then so would my score.