Perfect Dark cheats: Hidden cheese locations

Hidden cheese:
Every single player mission has a piece of cheese hidden in a location that has nothing to do with your mission objectives.
Information in this section was contributed by Chris DeLeon.

dataDyne Central: Defection, dataDyne Central: Extraction, and Mr. Blonde's Revenge Mr. Blonde's Revenge:
To find the cheese in the first level, go into the first room inside the building. Look at the computer monitor you work with under the Special Agent and Perfect Agent difficulty setting, and blow up the column to the right of it with explosives (such as the Rocket Launcher). Climb down the ladder and the piece of Swiss cheese is sitting in the vent.
Information in this section was contributed by Farfecknouggen.

In dataDyne Central: Defection and Extraction and Mr. Blonde's Revenge, there is a piece of cheese hidden in the vents in the hidden room in Cassandra's office.
Information in this section was contributed by Boris717.

In the dataDyne Central: Defection and Mr. Blonde's Revenge level, the cheese can be found by blowing open the vent shaft to the right of the first computer screen object hanging on the wall in the red light. Alternately, go into Cassandra's office and move along the right wall. Blow a hole in the wall at the corner. In the third level, though the same area, you cannot blow up the cylindrical wall to get to it.
Information in this section was contributed by Farfecknouggen.

Area 51: Rescue, Area 51:Escape, Maian SOS:
There is a piece of cheese at the end of the vents that drop you into the showers.
Information in this section was contributed by Boris717.

Skedar Ruins and War!:
There is a piece of cheese in the "S" shaped crack in the wall by the second shield in the level. Go down the small alley by the entrance to the Skedar base to the tunnel where the shield is located. Look through the crack and you will see the cheese.
Information in this section was contributed by Boris717.

Air Base: Espionage:
the is a piece of cheese outside. You must use the Horizon Scanner or Sniper Rifle. After you go through the cave, turn right into the small ledge. Use your scope of your snipers rifle or Horizon Scanner to look down at the water below. There is a piece of cheese in the corner .
Information in this section was contributed by Boris717.

Air Force One: Anti-Terrorism :
Face away from where the President's escape pod is contained. Look to the right of the bulbous object towards the wall on your right. This particular piece of cheese is not very detailed.
Information in this section was contributed by Farfecknouggen.

There is a piece of cheese hidden in the machinery by the Escape Pod where the president goes.
Information in this section was contributed by Boris717.

Area 51: Rescue level:
Note: This may not work under all difficulty levels, but will work under Special Agent. After going up the first elevator, go right (the wrong way). Get close to the man before shooting him, and someone should open the locked door from the other side. Go up onto the catwalk and walk across one of the bridges into a hole. Look to the end of it to see the cheese. Going down the hole will place you in the showers.
Information in this section was contributed by Farfecknouggen.

Attack Ship: Covert Assault:
There is a piece hidden in the floor. Turn right after you emerge from the first elevator at the beginning. Through the door on the right, where the Skedar come through, is a blue hole in the ground. In a corner of the hole is a piece of cheese.
Information in this section was contributed by Boris717.

Carrington Institute: Defense:
There is a piece of cheese wedged up above the door that the Skedar broke open. Just go through the door and up the ramp. Turn around and use your AR34 to see the cheese.
Information in this section was contributed by Boris717.

Carrington Institute:
Note: It is easier to find this piece of cheese when you are not playing the solo mission in the Carrington Institute, so you do not need all guns. Go down to where the jerk is and take the hover crate up the ramp. Hold the door to the target range area open with it. Stand just in the practice area so the door will hit you when it tries to close. Press Start, select Slayer, and put it on Bronze, which gives the most time. Fly it in its secondary mode all of the way down the ramp. When you get out in the open, go up and to the right. The cheese is sitting above the door that is broken open in the solo missions.
Information in this section was contributed by Farfecknouggen.

Carrington Villa:
Go to the beer bottle location, then go to the Carrington door but do not open it. Turn around then you will see two "beer bottles". Go to the hallway with the first "beer bottle" that you saw. Move against the wall, then stand back. Then at the top, if you can see the middle, is be a piece of cheese.
Information in this section was contributed by Frank Keyes.

In the Carrington Villa, there is a piece of cheese on top of the 4th wine shelf in the basement.
Information in this section was contributed by Boris717.

Chicago: Stealth:
Enter the building the limo is parked besides and go down the ramp. Do not kill the men there -- just disarm them and let them run into the locked area which also allows you in. Find the bathroom and look in the toilets in the stalls. The left one contains the cheese.
Information in this section was contributed by Farfecknouggen.

In Chicago: Stealth the is a piece of cheese in one of the toilets in the "Pond Punk" bathrooms.
Information in this section was contributed by Boris717.

dataDyne Research: Investigation:
Go to the experiment location to finish an objective under the Perfect Agent (or Special Agent) difficulty setting. Then, go through the other door in the room. After one door you should see another door - go through that door but stay still. Shoot the scientist at that location, then go straight ahead to find a glass floor. Look around that floor to find the cheese.
Information in this section was contributed by Frank Keyes.

There has a piece of cheese hidden underneath a glass floor in the third lab where the rude scientist is supposed to turn of the experiments.
Information in this section was contributed by Boris717.

Deep Sea: Nullify Threat:
There is a piece of cheese in the water. Go through the first doors at the beginning of the level and turn left. With a scope, look out through the window at the ocean floor. A piece of cheese is on the ground.
Information in this section was contributed by Boris717.

Go to the door that leads to the second room when you first start the level. Open the door, then look left in the first window. Search carefully and if you see something yellow, use sniper rifle to examine it closer.
Information in this section was contributed by Frank Keyes.

G5 Building: Reconnaissance:
Go down to where you work with the computer under the Perfect Agent difficulty setting. Look in the vent to see the cheese.
Information in this section was contributed by Farfecknouggen.

In the G5 Building there is a piece in a vent by the computer mainframes in the room where you shut down the Damping Field Generator.
Information in this section was contributed by Boris717.

Skedar Ruins:
Go until you get to the Skedar that have slayers. Take one, then return to the area where you blow open the wall. Facing the way you do when you first enter the area, go right. In that area, there is a small S-shaped hole in the wall. Shoot the Slayer Rocket through in its secondary mode -- look down at the floor to find the cheese.
Information in this section was contributed by Farfecknouggen.

On Skedar Ruins, where you blow up the wall, is a Skedar that attacks you. Turn left from the area he appears from and keep going down that path, killing the Skedar. When you get to the end, there will be a crack in the ground. Do not worry, you cannot fall through. Drop down and kill the Skedar and get the shield. Then, turn around and look through the S-shaped crack in the wall. Having a gun with a scope (such as the Falcon 2 or the Sniper Rifle) will help. Look slightly down and to the left through the crack to find the cheese. You may have to adjust yourself a bit before you can see it.
Information in this section was contributed by Elvis.