Secret Missions
Entry Location:
Password prompt

AmbushU454 - Unlocks "Ambush"
CloseQ8M3 - Unlocks "Close Quarters"
StrongM577 - Unlocks "Coastal Stronghold"
RaidT18Z - Unlocks "Night Raid"
OFPWEB2 - Unlocks "Debris Field"
OFPWEB1 - Unlocks "Encampment"