Full list of all 41 Bodycount achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Won 10 Deathmatches of any type
Survived the Pirate Bay siege
1000 online kills
Survived the Militarised Compound siege
Survived the Mine siege
Defeated K-8 Nemesis Widowmaker
Single player challenge complete on hard
Single player challenge complete on normal
Single player challenge complete on easy
Broke down the enemy's door
Achieved all objectives in Asia
Medic Population Diminished
Killed 5 enemies at once with a single Airstrike
Achieved all objectives in Africa
Survived K-8 Nemesis Widowmaker encounter
Survived the Street siege
Killed 10 enemies with the last round in your weapon
Achieved 100 co-op kills within a siege
Achieved 50 co-op kills within a siege
10 surprise kills executed
killed 10 enemies through cover
OSB Airstrike upgraded
OSB Pulse Wave upgraded
Achieved Sniper Distance Kill
Scavenger Population Diminished
Killed 10 enemies using melee
Killed 10 enemies with mines
Killed 10 enemies while health is low
OSB Explosive bullets upgraded
Skillkill x25
Highest value intel collected following multiple skillkills
Killed 3 enemies at once with a single grenade
OSB Adrenaline upgraded
Induction Completed
Killed 10 enemies with explosives
Killed 10 enemies from behind
Killed 10 enemies with grenades
Killed 10 enemies with a headshot
Skillkill x10
Won a Deathmatch
Won a Team Deathmatch