01: Crackdown (Xbox 360)

Crackdown is an excellent sandbox game along the lines of the Grand Theft Auto series. You play as a law enforcer tasked with assasinating crime lords in a sizeable map, with various skills and vehicles at your disposal.
-Pros: Large map, fun vehicle physics, amusing weapons, although the story is very basic (go here: kill him) it's surprisingly addictive, and you will find yourself playing for hours trying to find the agility orbs that allow you to run faster and jump higher. The graphics are somewhat dated, but the art style still looks great today.
-Cons: Gameplay can get repetitive for those of you with shorter attention spans, that's all i can really complain about, it's a very solid game.
-Price: The game has been out for a while, the selling price for your used copy will probably be around 5-10€/$. Crackdown 2 is out in stores, so the price of the first game has dropped, expect to pay around 30€/$ for a new copy, and from 10-15€/$ for a used copy.