| Unlockable: | How to unlock: |
| A Peek into the Future | Watched Aftermath teaser |
| 10 |
| All Rounder | Won one match in Free For All, Team Deathmatch, and Domination |
| 10 |
| Blood Brothers | Completed all Campaign Chapters in Co-op |
| 50 |
| Challenge Accepted | Completed your first Declassified mission |
| 5 |
| Death to Locust | Killed with all classes of COG in Overrun or Survival |
| 10 |
| Death to the COG | Killed with all classes of Locust in Overrun |
| 10 |
| Determined | Completed all Campaign Chapters on at least Casual difficulty |
| 10 |
| Dominator | Won one match on every map in Domination |
| 10 |
| Fearless | Achieved level 50 a second time and chose to re-up for another tour |
| 50 |
| Friends | Completed Aftermath |
| 10 |
| Globe Trotter | Won a match on every map in all Versus modes |
| 10 |
| I Told You | Completed Downtown Halvo Bay |
| 10 |
| Iron Fist | Completed all Campaign Chapters on at least Hardcore difficulty |
| 25 |
| Jack of All Trades | Won 10 matches of Overrun |
| 10 |
| Let's Do This | Achieved level 50 and chose to re-up for another tour of duty |
| 50 |
| Level 10 | Reached level 10 |
| 10 |
| Level 20 | Reached level 20 |
| 10 |
| Level 30 | Reached level 30 |
| 15 |
| Level 40 | Reached level 40 |
| 25 |
| Level 5 | Reached level 5 |
| 5 |
| Level 50 | Reached level 50 |
| 25 |
| Lion Heart | Completed all Campaign Chapters on Insane difficulty |
| 50 |
| Never Forgotten | Recovered 10 COG Tags during the Campaign |
| 10 |
| Never Give Up | Completed at least 20 Declassified missions |
| 10 |
| Open Arms | Completed Halvo Bay Military Academy |
| 10 |
| Overran | Won one match on every map in Overrun |
| 10 |
| Party People | Played any section in 4 player Co-Op |
| 10 |
| Proud Wearer | Equipped your first Medal |
| 5 |
| Quality Soldiering | Completed all Declassified missions |
| 50 |
| Ready for War | Earned at least one Onyx medal |
| 20 |
| Respect for the Fallen | Recovered all 48 COG Tags during the Campaign |
| 20 |
| Ribbon Master | Earned 3 unique Ribbons in any section |
| 10 |
| Rising Star | Attained 50 Stars on at least Casual Difficulty |
| 10 |
| Roaming Free | Won one match on every map in Free For All |
| 10 |
| Seriously Judgmental | Completed all Declassified Missions on Insane difficulty |
| 75 |
| Shooting Star | Attained 75 Stars on at least Normal Difficulty |
| 20 |
| Star Struck | Attained 100 Stars on at least Hardcore Difficulty |
| 50 |
| Steel Nerves | Completed all Campaign Chapters on at least Normal difficulty |
| 10 |
| Superstar | Attained all Stars on Insane Difficulty |
| 50 |
| Survivor | Completed wave 10 on all maps in Survival mode |
| 10 |
| Sybarite | Earned the Onyx "War Supporter" medal |
| 50 |
| Take Back This City | Completed Onyx Point |
| 10 |
| Team Leader | Won 10 rounds of Team Deathmatch |
| 10 |
| Team On Tour | Won one match on every map in Team Deathmatch |
| 10 |
| The Aftermath | Unlocked Aftermath |
| 20 |
| The Real Thing | Completed Seahorse Hills |
| 10 |
| They Called Him Karn | Completed Museum Of Military Glory |
| 10 |
| This One's Not Over | Completed Courthouse |
| 10 |
| Unstoppable | Achieved level 50 a third time and chose to re-up for another tour |
| 50 |
| Veteran Remembrance | Recovered 25 COG Tags during the Campaign |
.