Syphon Filter: Dark Mirror Codes -

AK-47 weapon:
Complete the Headshots goal in Mission 6-1 to unlock the AK-47 in Mission mode.

FAMAS weapon:
Successfully complete Training Mission 2 in single player mode under three minutes.

M1 Super 90 weapon:
Destroy five DU containers in Mission 4-1 in single player mode to unlock the M1 Super 90 in Mission mode.

M-134 Minigun:
In the "Jimmy Zhou's Army" bonus mission, the last enemy before Zhou will have a minigun. Kill him when he is not against a wall. You will most likely be able to retrieve the minigun.

M16A2 weapon:
Destroy five DU containers in Mission 4-2 in single player mode to unlock the M16A2 in Mission mode.

M249 SAW weapon:
Successfully complete the "KemSynth Tower" mission with a time less than 2:45.

M4 Carbine weapon:
Destroy five DU containers in Mission 4-3 in single player mode to unlock the M4 Carbine in Mission mode.

M4 Silenced weapon:
Get 10 headshots in Mission 7-1 under the hard difficulty setting to unlock the M4 Silenced in Mission mode.

SMAW rocket launcher weapon:
Shoot all the small warheads in Mission 4-3 to unlock the SMAW in Mission mode.

Shot Defender weapon:
Successfully complete the "Sana Yemen" mission with a time less than 3:40.

UNP.45 weapon:
Successfully complete Training Mission 3 without wasting a shot.

"Birds Of A Feather" bonus mission:
Successfully complete Story mode under the normal or hard difficulty setting.

"Goodnight, Sweetheart" bonus mission:
Beat all the time limits in all Training missions.

"Jimmy Zhou's Army" bonus mission:
Successfully complete the "Birds Of A Feather" bonus mission.

"Trapped In The Hornets Nest" bonus mission:
Get all "Combat Sharp Shooter" patches.

"Up A Column Without A Paddle" bonus mission:
Get all "Elite Weapons Expert" patches.

Multi-player mode weapons:
Achieve the indicated rank or earn the indicated badge in multi-player mode to unlock the corresponding weapon in multi-player mode.

33 SC-1 and SG-76 H-Bar (Snipers): Rank R2 
AR-15 and Draugonov (Snipers): Rank T2 
Claymore Mines: Expert Gadget Expertise Badge 
Desert Sniper .357 and SP-57 (Pistols): Rank O3 
Double Sawn-Offs (Pistol): Elite One-handed skill badge 
EMP Grenades: Expert Explosive Expertise Badge 
EPDD: Elite Hand to Hand Combat Badge 
Laser Mines: Elite Gadget Expertise Badge 
M16K and Galil (ARs, Full Auto): Rank O2 
M60 E-3 and Chinese Type-56 (HMGs): Rank O1 
M67 Grenades: Elite Explosive Expertise Badge 
MDS A3 and Spectre (Full Auto SMGs): Rank R1 
MDS-7 and Ripper (SMGs in pistol slot): Rank T1 
Shot Defender and SPA-12 (Shotguns): Rank R3 
Trip Bar and Ramat (HMGs/ARs): Rank T3 
USAS-12 and Sawed Off (Shotguns): Rank 04 

R1 multi-player rank:
Get 70 kills in multi-player mode.