Unlock Elite Mode:
Unlock Elite mode in co-operative play by clearing co-op story mode. Elite mode basically starts both spies off with no ammo for the SC-20K or the SC pistol. Time to work that knife.

Hint: Cameras In The Dark:
Cameras that do not use thermographic vision can be be fooled by shooting out all the ambient and direct light sources to darken the area. As long as the light meter is completely dark, these normal cameras cannot see your spy.

Hint: Displace International Milan Nedich Objective:
Laser mic and record (by zooming in with the EEV) the conversation on the third floor when a merc is assigned to the penthouse by an executive (the room is first one on your right when you get off the elevators on the third floor). Aim the EEV (binoculars) at the glass. This is the ONLY way to get credit for listening to the conversation.

Hint: Dvorak's Output:
Speak to the old man multiple times until the conversation clears and he walks to the area with two of the five tubes. With only three tubes to watch over, Fisher can hit the switch on the tubes as the lights above each tube go from green to orange. Hit the switch before they turn red and overheat to get past this part.

Hint: Hokkaido Milan Nedich Objecitve:
Inspect the two SUVs' license plates either remotely (through Fisher's binoculars) or by interacting with them up close. Redding sheds some light on the real Milan Nedich.

Easter Egg: Metal Gear Solid:
Enemies in the Kokubo Sosho's (stage 10) basement have LTL (Less Than Lethal) stunguns. Interrogate any of the guards in the basement about their zapping toy for some amusing comments regarding ammunition. Take that Snake!

Easter Egg: Prince of Persia:
During Stage 5, while infiltrating Displace International, Fisher will be able to come across two guards talking about another great UbiSoft hit the Prince of Persia Warrior Within. It is the small cafe next to a laser filled hallway, past a keypad locked door. A second way to access the room is through a vent, but about half the conversation is muffled due to Fisher being stuck inside a vent. Game of the year indeed!