Full list of all 85 BRAIN / OUT achievements.
The base game contains 84 achievements, and there is 1 DLC pack containing 1 achievements.
Perform 1000 kills with M4A1
Perform 1000 kills with AK-74
Spend 5000 minutes in game
Make more than 500 double kills
Make 500 knife kills
Make 300 kills with any secondary weapon
Provide 1000 rounds
Make 100 kills using C4 or Claymore
Make more than 3000 kills
Make 1000 headshots
Waste more than 20000 rounds
Capture more than 100 points
Commit 100 HEAD TO HEAD kills
Die more than 1000 times
Make three triple kills
Make 500 kills with any primary weapon
Make 200 kills from TOZ-34
Heal 10000 health points
Make 120 kills using grenades
Take out 20 dog tags from the conflict area
Crack Into three safes on the conflict area
Use 10 medikits on the conflict area
Exit the conflict area 5 times
Perform 1000 kills with Remington SPR220
Perform 1000 kills with UMP
Perform 1000 kills with AKS-74U
Perform 500 kills with OTs-33
Perform 1000 kills with L85A2
erform 1000 kills with AS WAL
Perform 1000 kills with KRISS
Perform 1000 kills with MTs255
Perform 1000 kills with AK-74M
Perform 500 kills with PB
Perform 1000 kills with M1014
Perform 1000 kills with PDR-C
Perform 1000 kills with AK-15
Perform 1000 kills with Stoeger DD
Perform 1000 kills with QBZ 95
Perform 500 kills with CZ 75
Perform 1000 kills with AUG A3
Perform 1000 kills with MDR
Perform 1000 kills with Kiparis
Perform 1000 kills with MP5SD6
Perform 500 kills with Baltiets
Perform 1000 kills with AA-12
Perform 500 kills with SG P226
Perform 1000 kills with OTs-14
Perform 1000 kills with SG 552
Perform 500 kills with Deagle
Perform 1000 kills with ACR
Perform 1000 kills with AEK-971
Perform 1000 kills with FN FAL
Perform 1000 kills with MG36
Perform 1000 kills with M4A1 Desert
Perform 1000 kills with AK-105
Perform 1000 kills with Saiga
Perform 500 kills with AUG
Perform 1000 kills with M16A2
Perform 1000 kills with Galil
Perform 1000 kills with Veresk
Perform 1000 kills with M16A4
Perform 1000 kills with AN-94
Perform 1000 kills with 9A-91
Perform 1000 kills with TAR-21
Perform 1000 kills with FN F2000
Perform 1000 kills with Bizon PP-19
Perform 1000 kills with Agram 2000
Perform 1000 kills with SIX12
Perform 1000 kills with AKMS
Perform 500 kills with Rhino
Perform 500 kills with USP
Perform 1000 kills with MP5
Perform 500 kills with Beretta M9
Perform 1000 kills with AKM-74/2
Perform 1000 kills with HK416
Perform 1000 kills with HK417
Perform 1000 kills with G36
Perform 1000 kills with SPAS-12
Perform 1000 kills with MAC-10
Perform 1000 kills with SCAR-H
Perform 1000 kills with FAMAS
Perform 1000 kills with P90
Perform 500 kills with MP5K
Perform 500 kills with Walther P99
Perform 1000 kills with AK-105 Bullpup