Here is the full list of all 30 Warhammer 40,000: Battlesector achievements.
Complete the Age of Crimson Dawn campaign
Sacrifice all Death Company units at Wind River Canyon
Complete Act Two
Clear Kemrender of infestation nodes
Complete any campaign mission using only melee
Win a skirmish battle against Blood Angels
Kill a Hive Tyrant in a multiplayer game
Kill a Blood Angels Lieutenant in a multiplayer game
Call in a Stormraven missile strike
Kill a Genestealer
Unlock an Adepta Sororitas unit
Collect Gallians staff
Kill a Trygon with a pistol
Recruit a Baal Predator
Trigger the Volatile ability
Recruit a Furioso Dreadnought
Complete Act One
Unlock a Tier 5 node in a tech tree
Unlock a Tier 3 node in a tech tree
Kill an enemy unit with a grenade
Unlock a Tier 1 node in a tech tree
Unlock a flying unit
Complete the tutorial
Score a critical hit with a chainsword
Heal an ally
Use the fallback command
Kill a Tyrannofex
Kill unit with a flame weapon
Score a critical hit with a bolter
Use the interact command