OPERATOR

1. 
   Seasoned Operator

   Kill 500 armed combatants without dying
   1.3%
2. 
   Geneva SuggestionSecret

   Steam withholds the description of a secret achievement.
   66%
3. 
   Fallen EagleSecret

   Steam withholds the description of a secret achievement.
   65%
4. 
   Hanging by a threadSecret

   Steam withholds the description of a secret achievement.
   7.0%
5. 
   FEAR NO MAN.

   Kill 10,000 armed combatants
   0.7%
6. 
   TIER 1 EXECUTION

   Complete the mission without anyone taking damage. (Requires more than 1 person)
   19%
7. 
   High Speed, Low Drag

   Complete an operation in less than a minute.
   7.3%
8. 
   We're so back baby.Secret

   Steam withholds the description of a secret achievement.
   60%
9. 
   TOTAL MISSION FAILURE

   Fail an operation, this better be the last.
   67%
10. 
    WATCH YOUR FIRE!Secret

    Steam withholds the description of a secret achievement.
    36%
11. 
    LAST MAN STANDING

    Win as the last one alive
    23%
12. 
    Mozambique Drill

    "two to the body, one to the head"
    64%
13. 
    Urban Legend

    Complete Kabul Streets on Tier 1 difficulty with 40 or more enemy combatants
    6.9%
14. 
    Dirty Mess

    Complete "Clean House" on Tier 1 difficulty with 30 or more enemy combatants
    15%
15. 
    Dead in the Water

    Complete "Darkwaters" on Tier 1 difficulty with 30 or more enemy combatants
    8.7%
16. 
    Kinetic Justice

    Complete Adjara Province, Georgia on Tier 1 difficulty with 30 or more enemy combatants
    7.8%
17. 
    Forever War

    Complete Kandahar Province, Afganistan on Tier 1 difficulty with 40 or more enemy combatants
    6.6%
18. 
    Clipping Wings

    Complete Lori Province, Armenia on Tier 1 difficulty with 30 or more enemy combatants
    6.4%
19. 
    El Dinero Hombre?

    Complete Sinola Highlands, Mexico on Tier 1 difficulty with 30 or more enemy combatants
    7.9%
20. 
    Violence of action

    Complete Mykolaiv Oblast, Ukraine on Tier 1 difficulty with 30 or more enemy combatants
    6.4%
21. 
    Apex Predator

    Beat all Tier 1 difficulty challenges
    4.2%
22. 
    Dumbass.Secret

    Steam withholds the description of a secret achievement.
    22%
23. 
    Compound Interest

    Complete Logar Province, Afghanistan on Tier 1 difficulty with 30 or more enemy combatants
    6.5%
24. 
    Predator Vision

    Beat all Tier 1 difficulty challenges at night time.
    3.1%
25. 
    Return to Sender

    Complete Deir ez-Zor Governorate, eastern Syria on Tier 1 difficulty with 30 or more enemy combatants.
    6.7%
26. 
    Force Multiplier

    Survive all 20 waves at Combat Outpost Cobra, Afghanistan.
    8.3%

Names, descriptions and icons are the game’s own, as Steam publishes them; the share is how many owners have unlocked each, from Steam's global figures for 26 of them.