Stealth:

Complete the came without saving merryl, which means at the torture chamber you MUST give give in to the elctric shocks that Ocelot gives. In other words just die. at the end Otacon (Hal) will give you his stealth device.

Bandana:

Complete the game but this time save merryl, which means at the torture chamber you must NOT die and not give in to the electric shock that ocelot gives you. Snake will find a bandana on the Sledge.

James Bond Costume:

Complete the game SAVING Merrly. do this by not dieing in the torture chamber, after about 5 or more times of completing the game snake will have a James Bond Costume on, this occurs while snake is on the elevator going up towards the Hind D at the start of the game.

Ninja Costume:

Complete the game SAVING Merryl. Do this by not dieing in the tortyre chamber sequence, after completeing the game over 10 times snake will have a ninja costume on with stealth and Laser gun (cannot use laser gun), this occurs while going up the elevator towards the hind D at the start of the game.

Hidden Jokes:

1) - When crawling around in the ventalation shaft (while looking for the darper cheif) turn the first left and at the first hole look down and you we see a solider on the toilet.

2) - Also in the ventalation shaft if you have completed the game enough times you can get to see Meryl in her underwear, you must complete the game at least twice to see this.

3) - When fighting the Ninja look at the Desks in the middle of the room and you will find a Playstation laid on the desk along with a CD case.

4) - When trying to find Meryl in the necular war head rooms (the battle before Phsyco Mantis) as soon as you find meryl follow her into the girls toilets and go right down to the end cubical, you will see her in her underwear (again!), you must find her as soon as possible or else she would have fully changed into her usually clothes.

5)-Just before the second sniper wolf fight, walk to the right of the snow field, without triggering the battle squence, once you are a few steps away from the mall use your binoculars to look to the other end of the field, you will see a parachute and an unknown person will then contact you through codec.

6)-Just before the first Sniper wolf fight (in the cave with the dogs/husks) make snake hide in a box and wait for a few minutes, after a while a dog will walk up to the box and have sniff, after awhile of sniffing the dog will then urinate on the box.

7)-Just before the first Sniper wolf fight (in the cave with the dogs/husks) make the dogs like Meryl then after awhile of meryl loving the dogs etc.kick and punch Meryl for abit and then one of the dogs will bite Snake in the groin area (Ouch!)