"Buck" Firefight Character - Complete "Tayari Plaza" on Normal or higher.
"Mickey" Firefight Character - Complete "Kizingo Boulevard" on Normal or higher.
"Dare" Firefight Character - Complete the Campaign on Legendary difficulty.
"Dutch" Firefight Character - Complete "Uplift Reserve" on Normal or higher.
"Romeo" Character - Complete "NMPD HQ" on Normal or higher.
Lost Platoon - Complete the Uplift Reserve campaign mission on any difficulty.
Alpha Site - Complete the ONI Alpha Site campaign mission on any difficulty.
Chasm Ten - Complete the Date Hive campaign mission on any difficulty.
Last Exit - Complete the Coastal Highway campaign mission on any difficulty.