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.
Avoiding alert mode
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.
Beating Gurgolon
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.
Boss survival mode
Successfully complete Sons Of Liberty under any difficulty setting.
Casting theater option
Successfully complete Sons Of Liberty under any difficulty setting.
Control Codec sequences
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.
Control intermission sequences
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.
Control title screen
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.
Deactivating C4 bombs
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.
Digital camera
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.
Easy radio shots
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.
Easy shots in Snake Tales
In big shell evil, when you find the drugs, with Emma, loads of enimies will start to come in. Don't shoot them because when you kill them all more will come in. So, crawl under the shelves and shoot the enimies easily, be careful though because the can still shoot you. Once you have shot all the enimies in the area grab Emma and go through the open door.
European Extreme difficulty
Successfully complete the game under the normal difficulty setting.
How to know Hideo Kojima's exact date of birth
At the beginning of the plant episode at the first node enter the name "Hideo Kojima" and the date of birth blood type and country will automaticly be set.
In-game reset
Hold L1 + R1 + L2 + R2 and press Start + Select during game play.
Make Rose annoyed
At the beginning of raiden's chapter, when you are first looking for peter stillman, if you go into the women's bathroom and into one of the toilets, stay there for about 5 minutes not doing anything, if you have nothing equpied, call campbell on the codec, he will say something then rose will get angry, after this try calling rose and after a bit of speech you will see some funny choices. It's pointless but it's still funny!
Metal Gear Solid 1 Snake
Successfully complete 100% of the VR missions as Snake, Pliskin, Tuxedo Snake, Raiden, Ninja Raiden, and Raiden X.
Ninja Raiden
Successfully complete 50% of the VR missions as Raiden to unlock Ninja Raiden in the VR Missions.
Raiden X
Successfully complete 100% of the VR missions as Raiden and Ninja Raiden.
Photograph mode
Successfully complete bomb disposal mode, hold up mode (alternative missions), and eliminate mode to unlock photograph mode in the VR Missions.
Pliskin
Successfully complete 50% of the VR missions as Snake.
Skipping codec in a fast way
If you get a message on the codec and it opens automaticly you can skip it very fast. Just push in the four buttons (triangle+ circle + X + square) and you will see how fast you can play again, instead of repeatly bashing on your buttons.
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.
Tanker chapter: Marines in boxer shorts
You can make the Marines in the Tanker chapter appear in their underwear in the room where Metal Gear is being held. Press L2 two or three times when start at the title screen then select the normal difficulty setting. When you get to where you have to take pictures of Metal Gear, the nearby marines will not be wearing their pants.
Tanker chapter: Secret passage
In the Holds 2 room, go all the way to the left to find a hatch. Open it, and you will climb down into a small area. Crouch and go through the vent on the ground. You will eventually see a gun clip fall through and a man will start talking. His shadow will be on the ground. Wait there until his shadow leaves, then move through the area. After you get past that, you will reach an opening and an intermission sequence will begin. After it ends, crawl through a vent on the right side of the small room. After you crawl through, you will find a ladder. Climb up the ladder, and it will lead you to a small perch. Look down at the bottom of Metal Gear RAY, and you will see Ocelot standing there. He will then go away. You can keep doing this and experiment with things to do with Ocelot.
Tanker chapter: USP Suppresser
After completing the game once and saving it, start a new game with the saved data. On the Navigation Deck after the battle with Olga, go up the ladder to where you would normally get the Thermal Goggles. On the middle platform, before the goggles, should be a USP Suppresser on the left. You can now equip the USP with it and muzzle the gunfire for the rest of the Tanker chapter.
After you complete the Tanker chapter three or four times, you can find the USP Suppresser on the navigational deck after you defeat Olga. It is located on the second floor on the lookout, near where the thermal goggles are found.
Tanker chapter: Vulcan Raven action figure
Immediately when you enter the engine room, there is a small Vulcan Raven figure standing on the ground with a flashlight shining on it. If you shoot it, it will start shooting very small balls around and will repeatedly say "Raven!", or something similar.
Tuxedo Snake
Successfully complete 100% of the VR missions as Pliskin.
Unlock all mission characters
At main menu, select missions and then enter your name as UUDDLRLRBA.
