At the start of the Diary Of A Double Agent level, you can carry the bird. Shoot the bird with shurikens to get them back.
Cheat Codes
Press T then enter one of the following codes:
Effect-Code
All ammunition - ammo
All weapons - guns
All weapons, ammunition, health, armor - kfa
Full armor - armor
Full health - health
Get skillpoints (level 3-4) - skillz
God mode - god
Invisibility - poltergeist
Level completed - maphole
Level skip - nextmission
Scopes, silencer and camera zoom - mods
Show position - pos
Show version - build
Spawn snowmobile in snow levels - rosebud
Stronger explosions - baddaboom
Unlimited ammunition - tears
Floating tree
On the last chapter near the tower is a tree that hovers about a foot off the ground. It is on the far side of the ruins.
Hidden intermission sequence
In the begging of the first level "Call It A Hunch", go up the hill before the bird finishes talking. You will get an intermission sequence.
Missing background
On the last chapter where you fight the supersoldiers, next to the tower is a hole in the wall that leads to a path around the tower. Look at where the wall meets the tower. The ground and the wall do not quite meet.
Missing coffee
At the end of the mission with the Russians (Surprise Surprise), you must rescue your pilot and plane. Your pilot is drunk, and you have to sober him up with coffee. At times the coffee which is supposed to be on the stove in the kitchen, is not there, even if you are extra careful not to shoot at the kitchen beforehand.
Mysterious light
On the last chapter, there is a red light in the middle of the ocean that can be seen from the bridge on the south-west part of the island.
Suspended cat
On the first part of Chapter 12: Undersea, use the cat that is underneath the submarine on the crane while it is moving. The cat will stay suspended in mid air where it was dropped, hovering over the submarine.
Tranquilizer
When in a level where you cant shoot certain people, such as the police, you can use the tranquilizer to put them to sleep for a while.
Carry the bird...