Successfully complete the game two times and Snake and Raiden will be wearing sunglasses.

Successfully complete the game on the normal difficulty setting to unlock the European Extreme difficulty setting.

Successfully complete Sons Of Liberty, all VR missions, all alternative missions, and the Snake Tales missions to unlock Boss Survival mode.

Successfully complete bomb disposal mode, hold up mode (alternative missions), and eliminate mode to unlock photograph mode in the VR Missions.

Successfully complete Sons Of Liberty on any difficulty setting to unlock the "Casting Theater" option.

Successfully complete 50% of the VR missions with Raiden to unlock Ninja Raiden in the VR Missions.

Successfully complete 100% of the VR missions with Raiden and Ninja Raiden to unlock Raiden X in the VR Missions.

Successfully complete 50% of the VR missions with Snake to unlock Pliskin in the VR Missions.

Successfully complete 100% of the VR missions with Pliskin to unlock Tuxedo Snake in the VR Missions.

Successfully complete 100% of the VR missions with Snake, Pliskin, Tuxedo Snake, Raiden, Ninja Raiden, and Raiden X to unlock Metal Gear Solid 1 Snake in the VR Missions.

To knock out an enemy's radio easily, when you hold them up shoot it (on the belt to the right of their back). Also shoot an enemy's radio when they are knocked out to prevent them from calling for help if they wake up.

Successfully complete the game. The digital camera will be available when a new game is started. Also, the digital camera is locate in Strut E Shell 1. Go to the bottom of the screen and locate the platform with three red lights on it. Climb up onto it and equip the Z.O.E. Box. When the conveyor stops, press Action to climb on. You will be taken to another room. Press Action again to get off and retrieve the Digital Camera. Exit the room in the same fashion.

While playing a game, hold L1 + R1 and press Start + Select.