If you'd always wondered what it would be like to be a master criminal, then Payback is the game for you. It's entirely non-linear - to complete a level you simply have to obtain a certain number of points - how you get those points is entirely up to you; you can do what the local kingpin tells you, uncover secret missions or just go on a mad killing spree. There are lots of hidden surprises to discover, so you'll have to play the game through several times to find all the extras.