Crackdown

You can play time trial and get your stats up if that is what you mean, so no you are not.

Not at all. All you have to do is When you select campaign chose crime on/off to on there are no bosses but all the gangs will be at full power like at the very begining but you will have all your stats and the orbs will still be sitten there after you beet the last boss.

No you're not. If click singleplayer or campaign or whatever in the main menu, there an option that brings all gangs and gang bosses back to life, with your stats, armory, and impound intact.

No. You can start the game over in the main menu but you get to keep all your previous stats.

This is true if you select to restart everything with your stats and all but once you continue foward with it it will over write your save and have to go through the story again. But You have power sttats this time and you can take down the bosses easily.