| Unlockable | How to unlock |
|---|
| Metal Gear Solid 2: Sons of Liberty | - |
| Digital Camera | Beat the game on any difficulty. Load up your previous save, and it'll be in your inventory. |
| Bandana (infinite ammo) | Acquire over 46 dog tags in Tanker to unlock. Note: The bandana can only be used in the level Tanker and will not affect Plant with Raiden. |
| Stealth (Snake) | Acquire over 76 dog tags in Tanker to unlock. This item is only available in Tanker. |
| Blue Wig (infinite 02) | Collect 218 dog tags in Plant. |
| Orange Wig (infinite grip) | Collect 150 dog tags in Plant. |
| Brown Wig (infinite ammo) | Beat normal mode and collect 100+ dog tags on Plant. |
| Stealth (Raiden) | Beat the game with 120 dog tags on Plant. |
| Shaver | Grip Raiden over behind the caged fence at the beginning of the Plant chapter on Hard or Extreme difficulty. Raiden will then give it to Pliskin. When regrouping with Snake in Arsenal Gear, he will appear clean shaven. |
| Boss Survival mode | Complete the game once (Tanker and Plant). |
| Demo Theater | Complete the game once (Tanker and Plant). |
| European Extreme difficulty | Complete the game once (Tanker and Plant). |
| Alternate Title Screen | Complete the game once to get a new blue screen with Raiden in the background. To change back to the red one with Solid Snake, go back to the title screen when the opening demo plays. |
| Sunglasses | When a third playthrough is started on any chapter, Snake and/or Raiden will be wearing stylish sunglasses. |
| Metal Gear Solid 3: Snake Eater | - |
| Extreme Difficulty Mode | Complete the game once. |
| Patriot weapon | Complete the game once. |
| Tuxedo camouflage | Complete the game once. |
| Banana camouflage | Get the highest record time in every stage of Snake vs. Monkey. |
| Snake vs. Monkey levels 4 & 5 | Complete the game once. |
| Moss camouflage | Defeat The End by sneaking up behind him during battle and pointing a gun at him. He will lay on the ground. Point the gun at his head three times, aiming elsewhere when he speaks. |
| Mosin-Nagant | Defeat The End/MK22 only. |
| Stealth camouflage | Find and shoot all 64 Kerotan frogs that are scatter through out the whole game. |
| Sneaking camouflage | In Locker you put Major Raikov in (Second time you go to Groznjy Grad). |
| Mechanic uniform | In Second Locker on Far Right in Groznjy Grad (Near the locker where you put Major Raikov at). |
| Colt Single Action Army | Choose the gun on the right during the final duel. |
| Introduction movie | Complete Virtuous Mission. |
| Stealth camouflage (alternate method) | Beat the game with no alerts. |
| Animals camouflage | Defeat Ocelot using your tranquillizer. |
| Hornet Stripe camouflage | Defeat The Pain using your tranquillizer. |
| Spider camouflage | Defeat The Fear using your tranquillizer. |
| Cold War camouflage | Defeat Volgin using your tranquillizer. |
| Snake camouflage | Defeat The Boss using your tranquillizer. |
| Fire camouflage | Defeat The Fury using your tranquillizer. |
| Alternate EZ Gun | Start on Very Easy and you'll have it when you start. |
| Duel Mode | Complete the game once. |
| Theater Mode | Complete the game once. |
| European Extreme Mode | Complete the game once (different difficulty to Extreme). |
| Peep Show Movie | Collect all the Movies in Demo Theater. |
| DPM camouflage | Beat Special Duel Mode. |
| Green Face Paint | Beat Normal Duel Mode. |
