Mercs Direct Increase
Description: You can artificially increase the merc's skills in range and gadgetry offline. All you do is run around in a custom SysLink match with no opposition.

Direct skill: You can put in merc bots and corner them - sometimes they continuously run out a narrow dorrway you can exploit. Doing the Berserk attack (L3 - or click LEFTJOY) you slowly build the direct skill stat.

If you and 5 friends have 20 minutes to kill, set-up a private session and (by gentlemen's agreement - not 'Vestibule' agreement) berserk and headbutt the spies to their final life before letting them run around stealthily for their stealth increase or just rapidly for athletics skill increase. Overall gain makes everyone happy.

Elite Mode
If you want to unlock the Elite difficulty setting you need to finish Solo mode on any difficulty setting.

Spy Third Skin
How to unlock: You must get SPECIAL AGENT level.

Beat Emile
You need to have a flash and frag grenade and full life to do this trick. You will see a lifebox near the door outside of where Emile is on the right wall. Go outside to Emile and an intermission sequence will begin. After it's over,you may see a laser beam on your left. When the laser goes off and Emile is done shooting, roll to the next chair or bench. He will start shooting again. When he stops shooting again,continue doing this and go up and jump on the fence/rail. Now jump down down from it and take out Emile. Walk away for one or two seconds and drop the flash grenade near Emile. Shortly after uou drop it, drop your frag grenade in the same place. Emile will not see you drop it and will be defeated. Read the computer and defuse the bomb. *** You really need to take your time.

Alternate Endings
Finish the following tasks to get the listed ending:

Ending A - Good	Have your NSA trust above 33% and save at least two of the three targets (Crouse Ship, Hisham, Lambert).
Ending B - Normal	Have your NSA trust below 33% and save all three targets (Crouse Ship, Hisham, Lambert). Alternatively, have your NSA trust above 33% and destroy two of the three targets.
Ending C - Bad	Destroy all three targets (Crouse Ship, Hisham, Lambert). Alternatively, have your NSA trust below 33% and destroy two of the three targets.

Get Back to Cell in Ellsworth Penitentiary
You need to sneak out of your cell by crawling under the bed. Get the walkie-talkie and be back within the time limit. When you are up on the grating,don't take the pipe. Just drop off and you will knock out a guard. Go back to your cell and act normal. The grating is the only way down.

More Multiplayer Skins
You need to finish the listed task in Multiplayer mode if you want to unlock the listed skin:

Spy (second skin)	Achieve the "Recruit" rank (with a general average higher that 1%)
Spy (third skin)	Achieve the "Special Agent" rank (with a general average higher than 45%)
Uspilon Forces (second skin)	Achieve the "Field Agent" rank (with a general average higher than 20%)
Uspilon Forces (third skin)	Achieve the "Commander" rank (with a general average higher than 95%)

Unlockables: Endings
Best: You must end with NSA trust above 33%. Save at least 2 of the 3 targets.
Standard: You must end with NSA trust below 33%. Save the 3targets, or kill 2 of the 3 targets with NSA trust above 33%.
Weak: You must end with NSA trust below 33%. Kill all 3 targets, or kill two of the targets.

Comcast Message
You need to go to Multiplayer mode and select either Xbox Live or System Link. Go to Co-Op Challenges and select "CodeName: Onyx", then Choose Mission 03. Make sure this is a private game so that you can host your own room if you chose Xbox Live. Press X to start the game and go through the double doorway to the right of the gadget stock. Turn right at the stairs and walk up. You will see a Comcast sign on the wall. Turn and go up the stairs again and enter the room with the number "2" on the wall to the left of it. Once in the room, turn right to the first open window. Go all the way to the end of the walkway and jump to the landing directly in front of you. Climb up the ladder, stop, turn right until the camera is facing the building you just came from. Look up to see a huge Comcast billboard. Click the Right Analog-stick to view it from your goggles. D-pad Up zooms in and D-pad Down zooms out.

Bomb Defusing in Okhotsk, Russia Part 2
Mission 6: Okhotsk, Russia Part 2, Talk to the Captain and he will reveal that he has rigged the bombs to go off. Emile Dufraisne will tell you that they are in the machine room. Go through a crawl space near you and down the ladder. After you get to the machine room, disrupt the light near the ladder with your OPC and the camera that you will find nearby. Go to the first bomb on the same level as you are on. The bombs have a green light. Defuse them by cutting the wires in a certain order. The wire you have selected for cutting will be highlighted in green. You will know which wire to cut by a short vibration from the controller. After you select the wire the Captain will say that you now have three minutes. The rest other two bombs are located in the machine towers. One is upstairs opposite of the first bomb. *** There are three guards in the room. You need to quick save the game before you try to defuse the first bomb.

Achievements
You need to finish the listed achievement if you want to get the listed number of Gamerscore points:

Training Completed (10 points)	In Solo mode, successfully complete a training course.
Teacher's Pet (40 points)	In Solo mode, successfully complete both training courses.
Hero (20 points)	In Solo mode, complete the game with the best ending.
The Invisible Man (20 points)	In Solo mode, complete a mission without being detected.
Getting Technical (20 points)	In Solo mode, knock out 5 enemies using non-lethal gadgets.
The Collector (20 points)	In Solo mode, collect all gadgets and upgrades.
The Human Light Switch (20 points)	In Solo mode, use your EMP Pistol to turn off 20 light sources.
Professional Ninja (40 points)	Complete Solo mode on Hard difficulty.
Agent of the Month (20 points)	Complete the profiles of all the major members of the JBA.
Recruit (10 points)	Obtain an overall characteristics average of over 1%.
Operative (15 points)	Obtain an overall characteristics average of over 5%.
Field Agent (20 points)	Obtain an overall characteristics average of over 20%.
Special Agent (25 points)	Obtain an overall characteristics average of over 45%.
Officer (30 points)	Obtain an overall characteristics average of over 75%.
Commander (45 points)	Obtain an overall characteristics average of over 95%.
Bronze Trophy (15 points)	Complete all the challenges by obtaining at least the bronze medal.
Silver Trophy (30 points)	Complete all the challenges by obtaining at least the silver medal.
Gold Trophy (50 points)	Complete all the challenges by obtaining at least the gold medal.
Blackwing Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map..
Motorway 90 Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map.
Terminus Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map.
Slaughter House Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map.
Red Diamond Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map.
Boss House Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map.
Dawn Waves Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map.
USS Wisdom Expert (20 points)	Get at least 10 victories as a spy and 10 in the Upsilon Force and play 25 sessions in this map.

There are also are twelve secret achievements:

Ellsworth Assignment Completed (30 points)	In Solo mode, completed the Ellsworth Penitentiary assignment.
Iceland Assignment Completed (30 points)	In Solo mode, completed the Iceland assignment.
HQ 1 Assignment Completed (30 points)	In Solo mode, completed the first terrorist HQ assignment.
Okhotsk Assignment Completed (30 points)	In Solo mode, completed the Sea of Okhotsk assignment.
Shanghai Assignment Completed (30 points)	In Solo mode, completed the Shanghai assignment.
HQ 2 Assignment Completed (30 points)	In Solo mode, completed the second terrorist HQ assignment.
Cozumel Assignment Completed (30 points)	In Solo mode, completed the Cozumel assignment.
HQ 3 Assignment Completed (30 points)	In Solo mode, completed the third terrorist HQ assignment.
Kinshasa Assignment Completed (30 points)	In Solo mode, completed the Kinshasa assignment.
Save Hisham (10 points)	In Solo mode, saved Hisham's life.
Save Lambert (10 points)	In Solo mode, saved Lambert's life.
Defeated the JBA (100 points)	In Solo mode, completed the main storyline.

Electric Lock Pick
You must finish the primary objectives in JBA HQ 1.

Hack Times (Spies VS Mercs)
Hacking times for 1 bar, 2 bars, and 3 bars of proximity are way different. Use the listed times in conjunction with your remaining match time to best gauge what your next course of action should be.

*** Some challenges where your spy needs to hack all four terminals for a single objective file, the times remain relevant (but for 100% of that terminal's data).

Proximity Bar x1 = 100 seconds (real time)
Proximity Bar x2 = 50 seconds (real time)
Proximity Bar x3 = 25 seconds (real time)

Every Multiplayer Map
If you want to unlock all Multiplayer maps you need to win six games as a Spy and six games as a UPSILON Force member. You need to play a total of 25 games.

Disposing Hisham's Body
Wait until he is down in the parking space. Kill him and pick up his body. Walk over an put him in the back of the red car. Enter Place Charge and stand back. Detonate it and you will see "Opportunity Objective complete - Dispose of Hisham's body".

Second Skin for Spy
How to unlock: You must obtain RECRUIT level in multiplayer.

Bonus Equipment
If you want to unlock the listed item you need to finish the listed special objectives in Solo mode:

Electric Lock Pick	Primary objectives in JBA HQ 1
EMP Device - Enhanced	Primary objectives in JBA HQ 1
EMP Grenade	Secondary objectives in the Iceland Assignment
EMP Grenade - Attachment	Secondary objectives in the Cozumel Assignment
Explosive Sticky Camera-Attachment	Secondary objectives in the Iceland Assignment
Frag Grenade - Attachment	Primary objectives in JBA HQ 3
Gas Grenade	Primary objectives in JBA HQ 1
Gas Grenade - Attachment	Secondary objectives in the Cozumel Assignment
Hacking Device - Force Hack Upgrade	Primary objectives in JBA HQ 2
Hacking Device - Software Upgrade	Secondary objectives in the Shanghai Assignment
Night Vision - Enhanced	Primary objectives in JBA HQ 3
Shotgun Shell - Attachment	Secondary objectives in the Okhotsk Assignment
Smoke Grenade - Attachment	Secondary objectives in the Shanghai Assignment
Sonic Grenade - Attachment	Primary objectives in JBA HQ 2
Ultrasonic Emitter	Secondary objectives in the Ellsworth Assignment
Wall Mine - Flash	Secondary objectives in the Okhotsk Assignment
Wall Mine - Stun	Secondary objectives in the Ellsworth Assignment

Strange Corpse in Shanghai Hotel
While in the meeting,if you are trying to get to the safe,hide behind the bar after you pass the room with the man in the bathroom. Wait for someone to come through the door and sit down in the chair then shoot him in the face. The body should glitch. His knees should be in the floor. He will be standing up straight but will be inside the chair.