The following costumes become available when you search the indicated location.
Classic Black Suit
Found under the Gazebo in the narrow park, left of the main Oscorp Building downtown.
Unlock Future Foundation Suit
Search behind the gas station store in a small alley. One block right of north bridge.
Unlock Big Time Suit:
Search Times Square behind the red bleachers, on the glass.
Unlock Original Suit (No Belt)
When the game begins, you will have this suit. Go to Peter's apartment and check for alternate costumes. The original suit will be waiting in the closet.
Unlock Sam Raimi Trilogy - Classic Suit
When you register any of the game's DLC (including any pre-order code you may have received) and you will unlock this suit in Peter's apartment.
Added by: Sanzano Jul 2nd 2012, ID#8489