Full list of all 34 Warhammer 40,000: Mechanicus achievements.
The base game contains 24 achievements, and there are 2 DLC packs containing 10 achievements.
Survive the first mission
Complete a mission without using any Canticles
Defeat Agrolekh
Defeat Ekropis
Defeat Ubjao
Defeat Mhelob
Defeat Neftusk
Have a Tech-Priest unlock a full Discipline tree
Have a Tech-Priest unlock two full Discipline trees
Reach 50% in the awakening gauge
Reach a four Tech-Priest cohort
Reach a six Tech-Priest cohort
Unlock Skitarii Ranger Alpha
Unlock Skitarii Ranger
Unlock Skitarii Vanguard Alpha
Unlock Skitarii Vanguard
Unlock Kataphron Breacher
Unlock Kastelan Robot
Defeat Szaregon
Defeat Szaregon before the final countdown
Side with Videx
Side with Scaevola
Find and unlock a hidden moment
Complete the game in hard mode
Complete the game in Very Hard mode
Complete the game with the setting "Melee Only" selected at the start of a game
Complete the game with the setting "AoE weapon" disabled at the start of a game
Complete the game after starting with 0 Blackstone
Complete the game with the setting "Canticle number" equals 0 at the start of a game
Complete the game with the "Ironman" mode activated
Complete the game with the "Permadeath" mode activated
Complete the game with the Heretek content activated