Dark Agent mode
Finish the game in Perfect Agent mode completely.

Hints & Tips

Mission 7: X-ray goggles and Hawk
At the beginning before or after you have killed the two brothers, there are four lockers on the right wall of the side of the bridge that you start at. If you are looking across the bridge and turn 90 degrees, there will be four lockers on the wall. In one of them is a pair of X-ray goggles. Note: If you happen to look in the wooden crates on the side that you started on, there should be a weapon called the Hawk. It is a disk that you can throw and slice people with.

Mission 7: Secret passage
Before this mission, select the demolition kit in the weapons menu. In this mission, after you kill the two brothers go across the bridge heading for the rocket. When you reach the rocket, turn left and go down that road. When you are at the end of the road, there should be two doors. If you attempt to open them, they will say "secured." If you happen to go on to a ramp that is on the right side of the left door, there will be a crack in the wall. Just use the demolition kit to blow up the crack to go through the door.

Mission 13: Beating the final Boss
When the last Boss jumps to the platform you are on, he will lunge at you with his sword. Just before he swings it, jump out of the way. If done right, he will trip and fall. Swiftly, before he gets up, grab his sword from the ground beside him and start attacking him with it. Note: The sword can be used to hit three times in a row by quickly pressing R(3x's). If he manages to get away, he will summon his sword back to him. After this occurs, wait for him to jump back onto your platform and repeat.

When your in the Mansion Infiltration mission, there will be a room you have to go through that is full of guard wires. In the center of the room is a sword. If you take the sword and keep it for the duration of the mission, you will be able to bring it to any of the other missions. On the final mission, bring it with you. Then use the left bumper to dodge his attack and let him fall over. Before he gets up swiftly press R. This will only take one or two times. Take your time in shooting him. Focus on dodging while he is shooting energy balls or throwing pillars towards you. Bring a weapon with a silencer so that you can shoot him when he is trying to heal himself with people so he will drop them. The silenced weapons have the best aim and you will only need to shoot once.

Mission 13: Dodging the final Boss' moves
When the last Boss shoots plasma balls at you, just move out of the way. When he teleports onto your platform and starts running towards you with the sword, just dive roll out of the way before he swings the sword. This will save you from taking a lot of damage.

Easier weapons
When one player has gotten a weapon that another wants, go to Club:Stakeout on Agent. Now drop that player's weapon to a second player. Have any one of those players go on through the level normally. If done right, the new player could have the weapons in under three minutes. The quicker way through the level is to run in the club after the first objective is totally unarmed, and rush to the top to reach Jack Dark.

Weapon locations
Below is a list by level of every weapon and where to find them. Note: The first and last level do not count for obtaining weapons. To get a weapon to keep for use further on, keep it in your inventory at the end of the level. This is useful with the "Easy Weapons" . These are all done within Agent mode.

Rooftops: Escape
M60 (Heavy): Found once you reach the fire doors. Go past the fire doors and lock pick the door. It should be standing atop a artillery box beside the guard.

Jackal (Heavy): Found from the sniper if you did not shoot it off the building. The easiest way is to put away any weapon you have (Up) and use disarm (RB).

Mansion: Infiltration
Magsec 4 (Pistol): Found from every guard at the beginning of the level.

Viblade (Close Combat): Found once you are in the mansion. It is standing on a pedestal in the center of the laser maze.

Datacore: Demolition
P9P (Pistol): You start with this gun.

Nightclub: Stakeout
Falcon (Pistol): Found from just about any guard, like the first two.

UGL Liberator (SMG): Found from the guard on the third floor. He should have two.

DEF-12 Shotgun (Close Combat): Find from the enforcer in the beginning.

Subway: Retrieval
DW-P5 (SMG): Found in the open storage crate after you have gone through the parking garage.

CMP-150 (SMG): Found from a few guards.

Trinity: Escape
Psychosis Gun (Pistol): Found from most scientists in the level.

Jungle: Storm
RCP-90 (SMG): You can find this either from the assaulting guards or atop of boxes by the left wall. Try using this on that level each time you play. Secondary (RB) makes an outline of red around your enemy, at the lost of accuracy.

Temple: Surveillance
Plasma Rifle (Heavy): Found at end of level from any of the phantoms.

Laptop Gun (Assault): Found from one of the two guards after you have gone down two levels. If one of the guards plants one, reprogram and pickup. It should say reprogram once you are close to it.

Frag Grenade (Thrown): Found from some of the guards. This may be hard to find.

Multimine (Thrown): Found from the guard that is either on the water bridge, or around the corner after it.

Bridge: Assault
Shockwave (Heavy): Found from the fallen Carrington sniper once you go to help Jonathan's team.

Super Dragon (Assault): You may have found this gun before. Found at this level from a few of the guards on the bridge.

Laboratory: Rescue
Magnum (Pistol): Found from the yellow suited guards that come once the alarm is set off.

KSI-74 (Assault): Found from almost all blue guards.

River: Extraction
Rocket Launcher (Heavy): Hard to get and should only do this on co-op. Once you are outside, open the gate and clear the guards. Now on the hovercraft that you take, once on the gunner press Y to switch for a second heavy weapon (M60 and Plasma Rifle only).

Trinity: Infiltration
Combat Shield (Close Combat): Found from one of the guards after you have picked up Dr. Carrol. There are two guards once you find the round walkway that will lead to the lower level.

Hawk Boomerang (Thrown): Found in one of the boxes in the early part of this level. This is easier to get after you have picked up the X-Ray goggles in the weapon cases to the left once you begin.

Outpost: Rescue
FAC-16 (Assault): Found in one of the weapon cases after you save Jonathan.

Flash Bang (Thrown): Found from one of the guards in the room before you go pass the double keypadded door.