Metal Gear Solid 2: Substance

Successfully complete a Snake Tale to unlock the M9. Begin game play and use M9 to stun the Bosses instead of killing them to view an alternate ending sequence.

When a patrolling guard sees you, run into a room where the screen goes black and tells you where you are. The game will not go into alert mode, evasion mode, or caution mode.

To beat Gurgolon use your stinger to hit one of his targets. Afterwards, pull out an AK74-U and shoot the little blue thing swarming around where you shot him. The target will get smaller making it more difficult to hit.Eventually you will destroy the target, repeat until all targets are destroyed. Also theres a funny bit to the level: put on the BDU (enemy outfit) and equip the AK47-U. Let him trap you with his soundwaves and let him fire his eyebeams.Before it hits you, an explanation point pops above his head, which changes into a heart. He picks Raiden up and walks off with him as love music plays. Unfortunately you fail the mission.

Successfully complete Sons Of Liberty under any difficulty setting.

Press the L1 or R1 to move the faces. Press L1 for a negative response such as "No way" or "Why don't you do it?". Press R1 for positive responses. The responses change depending on who you are talking to. You will also hear who they really feel about their women.

Much like the Codec transmissions, you can also press L1 or R1 to zoom in during an intermission. The harder you press, the more the zoom. You will hear a gunshot. While holding the button, use the Right Analog-stick to move the view. Also during certain parts of some intermissions are sections where it looks like you are viewing the scene through a camera or binoculars. You can use the zoom feature with these as well, and the onscreen distance or zoom indicators will increase realistically the more you zoom in. This also can be done at the beginning of the game, before pressing Start.

Press L2 to hear a gunshot and see a flash at the title screen. Use the Right Analog-stick at the title screen to change the background color.

When deactivating the "Baby C4 bombs", the last one for the very easy and easy difficulty settings is under the submarine hanging from the ceiling in the bottom of Strut A Shell 1, where you started out as Raiden. The one on the hard difficulty settings always move around the room, usually in the caged area under the stairs or behind the computer controls.

If you use MGS1 Snake for theV.R. missions you will hear the V.R. theme from MGS1

Successfully complete the game. The digital camera will be available when a new game is started.
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.