The Amazing Spider-Man Unlockables

Unlockable Costumes
UnlockableHow to unlock
Big Time SuitGlass behind red bleachers in Times Square
Classic Black SuitUnder gazebo in the narrow park left of Oscorp's main building downtown
Classic Spider-man CostumeRhino Challenge DLC
Future Foundation SuitBehind gas station store in small alley one block right of north bridge
Negative Zone SuitAtop Beenox building (second inward from Brooklyn Bridge)
2012 Scarlet Spider CostumeGet the camera, then head for the bridge just north of the fountain located in Central Park