Unlock each item by finishing the mission in the time indicated. Go to movie player in options :> Extras to play movies (FMV's). Activate cheats at the cheat grid at options :> Extras :> cheat grid

Saliva Spy Hunter FMV - Beat level 1 in 3:40.
Green HUD - Beat level 2 in 3:35.
Saliva Your Disease FMV - Beat level 3 in 2:40.
Night Vision - Beat level 4 in 3:15.
Early Test Anamatic FMV - Beat level 5 in 3:25.
Extra Cameras - Beat level 6 in 3:45.
Rainbow HUD - Beat level 7 in 3:10.
Inversion Camera - Beat level 8 in 3:05.
Concept Art FMV - Beat level 9 in 3:45.
Fisheye View - Beat level 10 in 3:15.
Camera Flip - Beat level 11 in 3:10.
Puke Camera - Beat level 12 in 3:30.
Making Of FMV - Beat level 13 in 2:15.
Tiny Spy - Beat level 14 in 5:10.
Hover Spy - Beat the entire game.
Super Spy - Beat all 65 game objectives to get invincibility & unlimited ammo for car