Get the following number of "Gold" awards in single player mode to unlock the corresponding bonus:

Production Stills 1: 1 "Gold" award
Production Stills 2: 2 "Gold" awards
Production Stills 3: 3 "Gold" awards
Production Stills 4: 4 "Gold" awards
Production Stills 5: 5 "Gold" awards
Helicopter Weapon Upgrade: 6 "Gold" awards
Production Stills 6: 7 "Gold" awards
Serena: 8 "Gold" awards
Production Stills 7: 9 "Gold" awards
Tank Weapon Upgrade: 10 "Gold" awards
Underworld: 11 "Gold" awards
Cayenne Weapon Upgrade: 12 "Gold" awards
Production Stills 8: 13 "Gold" awards
Mya: 14 "Gold" awards
Vanquish Weapon Upgrade: 15 "Gold" awards
Production Stills 9: 16 "Gold" awards
Miss Nagai: 17 "Gold" awards
Production Stills 10: 18 "Gold" awards
Production Stills 11: 19 "Gold" awards
Katya: 20 "Gold" awards
Triumph Weapon Upgrade: 21 "Gold" awards
Production Stills 12: 22 "Gold" awards
Production Stills 13: 23 "Gold" awards
Nanotank Weapon Upgrade: 24 "Gold" awards
Production Stills 14: 25 "Gold" awards
Gallery: 27 "Gold" awards