There are 2 sweeps for these and I'm not exactly sure what they are or how they work. Thanks!

If you have a PS3 and have the game they are giving codes to, you can take these codes enter the Playstation network on the top of the page right side, will ask for codes to enter. When you enter the codes they give you free things specific to the game Special perks I guess you could say or extra maps, ect.
 Hope this has helped you in some way