Complete each achievement to get the allotted gamerscore.

Unlockables

Al Shatar Campaign (25) Complete The Liberation of Al Shatar campaign on any difficulty level
Ascension Bull (10) Complete Ascension with Bull
Ascension Ross (10) Complete Ascension with Ross
Ascension Taggert (10) Complete Ascension with Taggert

Barbarians at the Gate Bull (10) Complete Barbarians at the Gate with Bull
Barbarians at the Gate Ross (10) Complete Barbarians at the Gate with Ross
Barbarians at the Gate Taggert (10) Complete Barbarians at the Gate with Taggert
Battalion Count (50) Take out 500 enemies in any mode
Bomb Squad (30) Disarm 50 bombs in Devastation ranked matches
Breakout (15) Complete Breakout

Castle Festunburg Campaign (25) Complete The Raid on Castle Festunburg campaign on any difficulty level
Clash of the Titans (15) Complete Clash of the Titans
Company Count (20) Take out 100 enemies in any mode
Critical Mass Bull (10) Complete Critical Mass with Bull
Critical Mass Ross (10) Complete Critical Mass with Ross
Critical Mass Taggert (10) Complete Critical Mass with Taggert

Demolitions Expert (25) Destroy 25 Targets in Devastation ranked matches
Desperate Measures Campaign (25) Complete Desperate Measures campaign on any difficulty level

Fight the Good Fight (25) Place first in a multiplayer game on the losing team
First Place (30) Place first in a ranked match, all three game types

Good Citizen (20) Host active multiplayer games for 20 hours
Grenade Expert (20) Grenade 50 enemies in any mode

Head Hunter (20) Take out 20 enemies with a headshot in any mode
Hell from Above Bull (10) Complete Hell from Above with Bull
Hell from Above Ross (10) Complete Hell from Above with Ross
Hell from Above Taggert (10) Complete Hell from Above with Taggert
Heroic Defender (30) Save 50 flags in Capture the Flag ranked matches

Juggernaut (25) Kill 100 enemies in ranked matches

Last Second Hero (50) Score the tie breaker in a Devastation ranked match in the last 10 seconds.

Play all Multiplayer Modes (40) Complete a game in all Multiplayer Modes
Play Multiplayer (20) Complete a Multiplayer Game

Silent Victory (40) Stealth kill 25 enemies
Silver Medal (20) Capture 25 flags in Capture the Flag ranked matches
Snipe Expert (50) Snipe 75 enemies in any mode
Spray'n Pray (0) Run out of all your ammo in a ranked match.
Squad Count (10) Take out 10 enemies in any mode
Strategy by the Book Bull (10) Complete Strategy by the Book with BullComplete Strategy by the Book with Taggert
Strategy by the Book Ross (10) Complete Strategy by the Book with Ross
Strategy by the Book Taggert (10) Complete Strategy by the Book with Taggert

The Hallowed Halls Bull (10) Complete The Hallowed Halls with Bull
The Hallowed Halls Ross (10) Complete The Hallowed Halls with Ross
The Hallowed Halls Taggert (10) Complete The Hallowed Halls with Taggert
The Hill Bull (10) Complete The Hill with Bull
The Hill Ross (10) Complete The Hill with Ross
The Hill Taggert (10) Complete The Hill with Taggert
The Net Tightens Bull (10) Complete The Net Tightens with Bull
The Net Tightens Ross (10) Complete The Net Tightens with Ross
The Net Tightens Taggert (10) Complete The Net Tightens with Taggert
Total Victory (100) Complete every campaign

Whites of Their Eyes (30) Kill 10 enemies in a row in a ranked match without dying