Perfect Dark Cheats - Xbox 360

Achievements
Complete each achievement to receive the allotted gamerscore:

A Friend Indeed (10) - Complete any mission in Co-operative Mode.
Camera Shy (10) - Destroy 5 security cameras.
Carrington Institute Specialist (10) - Kill at least one enemy with each of the Carrington Institute weapons.
Crowning Glory (5) - Earn all the Leaderboard Crowns.
Act Your Age, Joanna (5) - Destroy Carrington's wine collection.
Agent (10) - Complete the Solo Missions on Agent.
Both Barrels (5) - Kill an enemy when dual-wielding.
Datadyne Specialist (10) - Kill at least one enemy with each of the Datadyne weapons.
Deadly Laptop (10) - Kill 50 enemies using the laptop in sentry gun mode.
Double 64 (10) - Kill 128 enemies using secondary fire mode.
Paci-Fist (10) - Complete any Solo Mission on Special Agent or harder using only your fists.
Perfect Agent (20) - Complete the Solo Missions on Perfect Agent.
Golden Days (10) - Complete a Combat Simulator game on Felicity, Complex or Temple using Classic Weapons.
How's That For Starters? (10) - Complete Datadyne Central - Defection.
Maian Specialist (10) - Kill at least one enemy with each of the Maian weapons.
Prime Target (10) - Complete every Challenge up to and including 29, the 10th Prime number.
Special Agent (15) - Complete the Solo Missions on Special Agent.
Tools Of The Trade (10) - Get a Bronze rating or better with all 32 weapons in the Firing Range.
Versatile (10) - Complete a Combat Simulator game using each of the six Scenarios.
...Who Needs Enemies? (10) - Complete any mission in Counter-Operative Mode.

Unlock Bonus Levels
Maian SOS mission - Beat Single player on Special Agent or Perfect Agent.
Mr. Blondes Revenge - Beat Single player on any dificulity.
The Duel - Get bronze or higher with every gun in the firing range.
War! - Beat Single Player on Perfect Agent.

Unlock GamerPics
#1 - Get all 4 multiplayer medals in one match (highest accuracy, most headshots, most kills, fewest deaths).
#2 - Earn 201% total game completion.

Unlock Cheats
All Guns In Solo - Have Perfect Dark Zero Save game on your profile.
Cloaking Device - Have Perfect Dark Zero Save game on your profile.
Hurricane Fists - Have Perfect Dark Zero Save game on your profile.
Weapons Stash Locator - Have Perfect Dark Zero Save game on your profile.

Unlock Skedar premium Theme
Get at least one kill with every gun (from Falcon 2 to Laser) in Combat Simulator.

Speed Run Cheats
Alien (Co-op Buddy) - Beat Attack Ship: Covert Assault on Special Agent in under 5:17.
All Guns in Solo - Beat Skedar Ruins - Battle Shrine on Perfect Agent in under 5:31.
Classic Sight - Beat dataDyne Central: Defection on Agent.
Cloaking Device - Beat G5 Building: Reconnaissance on Agent in under 1:30.
DK Mode (everyone has big arms and heads) - Beat Chicago: Stealth on Agent.
Enemy Rockets - Beat Pelagic II: Exploration on Agent.
Enemy Shields - Beat Carrington Institute: Defense on Agent.
Farsight XR-20 - Beat Deep Sea: Nullify Threat on Perfect Agent in under 7:27.
Hit and Run (Co-op Buddy) - Beat Carrington Villa: Hostage One on Special Agent in under 2:30.
Hotshot (Co-op Buddy) - Beat Area 51: Infiltration on Special Agent in under 5:00.
Hurricane Fists - Beat dataDyne Central: Extraction on Agent in under 2:03.
Invincible - Beat Area 51: Escape on Agent in under 3:50.
Jo Shield - Beat Deep Sea: Nullify Threat on Agent.
Laptop Gun - Beat Air Force One: Anti-Terrorism on Agent.
Marquis of Queensbury Rules (Enemies Don't Have Guns) - Beat dataDyne Central: Defection on Special Agent in under 1:30.
Perfect Darkness - Beat Crash Site: Confrontation on Agent.
Phoenix - Beat Attack Ship: Covert Assault on Agent.
Play As Elvis - Beat Area 51: Rescue on Perfect Agent in under 7:59.
Psychosis Gun (Makes enemies attack other enemies) - Beat Chicago: Stealth on Perfect Agent in under 2:00.
Pugilist (Co-op Buddy) - Beat dataDyne Research: Investigation on Perfect Agent in under 6:30.
R-Tracker/Weapon Cache Locations - Beat Skedar Ruins: Battle Shrine on Agent.
Rocket Launcher - Beat dataDyne Central: Extraction on Agent.
Slo-mo Single Player - Beat dataDyne Research: Investigation on Agent.
Small Characters - Beat Area 51: Infiltration on Agent.
Small Jo - Beat G5 Building - Reconnaissance on Agent.
Sniper Rifle - Beat Carrington Villa: Hostage One on Agent.
Super Dragon - Beat Area 51: Escape on Agent.
Super Shield - Beat Carrington Institute: Defense on Agent in under 1:45.
Team Heads Only - Beat Air Base: Espionage on Agent.
Trent's Magnum - Beat Crash Site: Confrontation on Agent in under 2:50.
Unlimited Ammo - Beat Pelagic II: Exploration on Special Agent in under 7:07.
Unlimited Ammo: Laptop Sentry Gun - Beat Air Force One: Anti-Terrorism on Perfect Agent in under 3:55.
Unlimited Ammo: No Reloads - Beat Air Base: Espionage on Special Agent in under 3:11.
Velvet Dark (Co-op Buddy) - Unlocked from the start.
X-Ray Scanner - Beat Area 51: Rescue on Agent.

Unlock Crackdown Armor for Custom Character
Simply have a save from Crackdown 2 on your HDD. When in Combat Simulator, go to the last slot and you'll have the armor as an option.