Retain Infamous 2 saved game files for completed story modes as Bad (Infamous) Cole and Good (Heroic) Cole and you will have the ability to access (purchase) the powers and abilities that were "Karma Locked" during your initial two playthroughs. You'll also get 15,000 XP to spend on the new moves.
This bonus is saved to the Infamous 2 master file on your PlayStation3, and cascades to all "cleared" games.
Note: You still purchase the powers to be able to use them. Happy fun XP-grinding. Story-related powers are not unlocked.
Additions by Tempt_Not_the_Blade