METAL GEAR SOLID 2: SUBSTANCE UNLOCKABLES
Stealth, Bandanna and Wig bonuses
Complete the following goals to get the Stealth (invisibility), Bandanna (unlimited ammo for Snake), and the Wig (unlimited ammunition for Raiden). To get Stealth and Bandanna, complete the Tanker mission three times on three different difficulty settings (all on the same saved file) and get all the dog tags. To get Stealth and Wig, complete the plant three times on three different difficulty settings (all on the same save file) and get all the dog tags.
Sunglasses
After completing the game two times, Snake and Raiden will be wearing sunglasses.
European Extreme difficulty
Finish the game under the normal difficulty setting.
Boss survival mode
Finish Sons Of Liberty under any difficulty setting.
Photograph mode
Finish bomb disposal mode, hold up mode (alternative missions), and eliminate mode to unlock photograph mode in the VR Missions.
Casting theater option
Finish Sons Of Liberty under any difficulty setting.
Ninja Raiden
Finish 50% of the VR missions as Raiden to unlock Ninja Raiden in the VR Missions.
Raiden X
Finish 100% of the VR missions as Raiden and Ninja Raiden.
Pliskin
Finish 50% of the VR missions as Snake.
Tuxedo Snake
Finish 100% of the VR missions as Pliskin.