Here is the full list of all 28 Space Hulk: Tactics achievements.
Empty your hand of cards in one turn playing the Terminators
Win a mission without any losses when playing as the Terminators
Win a mission with a Survive objective as the Terminator player
Kill a Terminator Sergeant
Empty your hand of cards in one turn while playing the Genestealers
Win a mission with a Defend objective as the Genestealer player
Win the first mission of the Genestealers campaign
Kill a Terminator with a melee strike from behind
Win a mission with an Extraction objective as the Genestealer player
Win the first mission of the Blood Angels campaign
Win a mission with an Extraction objective as the Terminator player
Revive a Terminator with the Narthecium
Create and share a mission
Win a Multiplayer game
Finish the Genestealers campaign
Win a mission with only one Terminator left alive
Win the Blood Angels campaign
Win a Skirmish game against the AI on an official mission
Win a mission with a Survive objective as the Genestealer player
Win a mission with a Defend objective as the Terminator player
Improve every card and give 2 modules to a single Terminator in the Blood Angels campaign
Win a game against another player in Quickmatch
Win a Flame Room mission with only one heavy weapon bearer in the squad
Kill the Librarian with the Broodlord
Play and win against another player in a mission created by a member of the community
Find and retrieve the Relic of the Emperor in the Blood Angels campaign
Move a unit within a burning area and have it survive
Create and share a mission by following all advice