Full list of all 12 Warhammer 40,000: Kill Team achievements worth 200 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox 360.
Use a special move
Unlock all weapons & ability upgrades
Complete a mission in co-op mode
Find all the collectables
Earn a gold Aquila in every survival challenge
Achieve a "Bloodbath" Kill streak
Kill 5000 enemies in total
Defeat the Warboss!
Complete a mission without using melee
Complete a mission without dying
Get over 50 kills with each weapon type
Play through each mission with two different Space Marines