Grand Theft Auto? My preference would be the Vice City one, mainly because of the soundtrack and ease of finding your way around compared to the other ones, though GTA:III is good too. I also prefer the character in Vice City compared to the later ones. "Quests" in the game start off being a bit of a lead-along to get you into the game but once you've done the first few, it's pretty much free rein to do what you like when you like. Further in the game when you complete quests and buy assetts they can earn you money. Various side quests (vigilante, paramedic, fire service) get you different rewards, but you don't "need" to do them. Quite amusing hearing various quotes over the radio saying you're innocent as you get more of a reputation. One "quest" is to spent a certain mystery amount in a pole dancing club - I'm sure you wouldn't object to that one! ;) And it does have an "end". Well, various ends. There's an end point which is finishing the final storyline quest, there's an endpoint for collecting all the hidden packages, there's an endpoint for copmleting the emergency services tasks, and there's an endpoint for finishing the three stadium tasks. Oh and musn't forget all the various "rampages", stunt jumps and flight/bike/radio-control checkpoint races you can do. So you can set the end where you like really.