[QUOTE="El_Galant"]Hey so I unlocked everything from the Sniper Challenge on PS3 but nothing transferred to the game. It says to insert code but where? on the PS Store? All I got was asking me to download the Sniper Challenge again and I already have it installed. What's the deal?[/QUOTE]
The Sniper Challenge unlocks should be there automatically - atleast they were on PC.
Check Unlocks - Safe House - Weapons - Kazo Sniper Rifle - Customise
I think 3 of the categories should show stage 3 unlocks.
The only code entry I am aware of is on consoles Contracts mode was planned to be a code in all new copies of the game and/or require Live for 360. That idea was scrapped shortly before launch, hence the additional free DLC on Live and PSN.