In the menu, go to additional content, then promotion code, and input.

Password Effect - 6aPHuswe Unlock all missions.

Promotional Codes - These codes are case sensitive and must be entered accordingly. A message will confirm that they have been entered correctly.

Password Effect

2Eprunef Bonus Mission
tr99pUkA Bonus Mission
THaCupR4 Bonus Mission
tar3QuzU Bonus Mission
SpujeN7x Bonus Mission
sa7eSUPR Bonus Mission
JeM8SpaW Bonus Mission
Cr34ufrE Bonus Mission
96CesuHu Bonus Mission
zUmU6Rup Bonus Mission

Unlockables

Trophies - Complete each condition to get the allotted Trophies. There are 38 Bronze Trophies, 7 Silver Trophies, 3 Gold Trophies, 1 Platinum Trophy.

...against the middle (Bronze) Switch sides in Bowa-Seko - the Southern Territory
...and demand. (Bronze) Unlock all weapons by hitting every Convoy
...into the fire. (Bronze) Save a Buddy from a mortal wound
Adventurer (Silver) Download and rate 25 usermaps
Bagman (Bronze) Deliver stamped travel documents to the Underground in exchange for medicine
Battle Hardened (Bronze) Play at least one full round in every Game Mode (Ranked Match)
Best in Class (Bronze) Get highest xp total in one match (Ranked Match)
Cold Blooded (Bronze) Subvert all the main faction missions in Bowa-Seko - the Southern Territory
Dawa ya moto ni moto (Bronze) Break the ceasefire and reignite the conflict
Down but not out (Bronze) Escape to Bowa-Seko - the Southern Territory
Dr Livingston, I presume (Bronze) Enter every 1 square kilometer map region of the world
Field Hospital (Silver) Get 500 revives (Ranked Match)
First Response Team (Bronze) Get highest revives count in a ranked match
Good night sweet prince (Silver) Comfort a Buddy and ease his passing
Heart of Darkness (Gold) Enter the Heart of Darkness
Hired Gun (Bronze) Reach Rank 5 (Ranked Match)
Investigative Reporter (Bronze) Turn over the first set of the Jackal's audio logs to the Journalist
Iron-guts (Platinum) Earn the highest honors
Last man standing (Bronze) Wipe out the senior leadership of both Factions and determine who will be the new Warlords
Lent a hand (Bronze) Complete a Buddy side quest
Lineman (Bronze) Complete a Mission intercepted from a cellular tower signal
Making friends (Bronze) Save a Buddy from captivity
Mapper (Bronze) Create a map and get it validated in all game modes
Mercenary (Silver) Reach Rank 20 (Ranked Match)
Messenger (Bronze) Complete all the available Underground side-quests in both the North and the South
On the run (Bronze) Escape the Town
Orienteer (Bronze) Find all the Safe Houses in Bowa-Seko - the Southern Territory
Out of the frying pan... (Bronze) Get rescued by a Buddy
Playing both sides... (Bronze) Switch sides in Leboa-Sako - the Northern Territory
Prison escape (Bronze) Escape torture at the old slave outpost
Professional (Silver) Reach Rank 10 (Ranked Match)
Pulitzer material (Bronze) Turn over all of the Jackal's audio logs to the Journalist
Ruthless (Bronze) Subvert all the main faction missions in Leboa-Sako - the Northern Territory
Safari Tour (Bronze) Play at least one full round in every Official Map (Ranked Match)
Soldier of Misfortune (Gold) Unlock field manuals for all weapons (Ranked match)
Stickin' it to the man (Bronze) Kill a Faction Captain in Leboa-Sako - the Northern Territory
Superior Captain (Bronze) Win a round as the Captain in Uprising mode (Ranked Match)
Supply... (Bronze) Unlock new weapons by hitting a Convoy
The best laid plans (Bronze) Work with a Buddy to subvert a mission offered by a faction
The horror... the horror... (Gold) Resolve your conflict with the Jackal to facilitate the exodus
The third faction (Bronze) Rescue all the Buddies from their respective predicaments
Upgraded Player (Bronze) Upgrade one class 3 times (Ranked Match)
Utility Man (Silver) Complete all Missions intercepted from cellular tower signals
Wages of Conflict (Bronze) Aquire all conflict diamonds in the game available through payment or exploration
Wanderer (Bronze) Find all the Safe Houses in Leboa-Sako - the Northern Territory
War Party (Bronze) Win a match with 16 players (Ranked Match)
Warlord (Silver) Achieve Rank 30 (Ranked Match)
Weapon Specialist (Bronze) Purchase the manuals and acquire the bandolier for one weapon
Weapons Expert (Bronze) Purchase the manuals and acquire the bandoliers for every weapon