Full Game Walkthrough...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Acceptable Losses	Complete a mission with only your leader surviving.
Arise!	Resurrect five Necron units using a single skill.
Awaken	Acquire all Dynastic Awakening upgrades as the Necrons.
Betrayal	Complete the epilogue after choosing the Betrayal ending.
Contingency Plan	Complete the second act of the Adeptus Mechanicus campaign.
Defender of Exveritas	Complete the first act of the Adeptus Mechanicus campaign.
Destroyer	Inflict more than 10 damage with a single attack.
Epilogue Unlocked!	Complete both campaigns on any difficulty.
First Contact	Complete the prologue.
Forge World	Construct all Forge-Temples and Forge Cities in the Adeptus Mechanicus campaign.
Knowledge is Power	Acquire all upgrades in one of a Tech-Priest leader's Augmentation trees.
Lector-Dogmatis	Grant a single Ritual effect to seven units with Videx.
Loyalty	Complete the epilogue after choosing the Loyalty ending.
Modified	Have a unit with five different statuses simultaneously.
One with the Machine	Acquire all upgrades in two of a single Tech-Priest leader's Augmentation trees.
Praefect Ordinant	Reach ten Data-choir stacks with Rho.
Prime Hermeticon	Move twelve cells in a single turn with Captrix.
Qivroth Awakened	Raise all Tomb Complexes in the Necrons campaign.
Regicide	Complete the second act of the Necrons campaign.
Shrine of Knowledge	Acquire all upgrades in the Manufactorum, Cohort Praedium or Temple of the Omnissiah.
Subdominatus	Grant the Connected status to all of Khepra's units in a skirmish.
Supreme Dominion	Reach Dominion level 10 as the Necrons.
Tactician	Kill five enemy units using environmental hazards.
Taking Every Risk	Reach maximum Vigilance level twice in a single mission.
Tech-Acquisitor	Reach ten Cognition points with Scaevola.
The Interlopers	Destroy a Forge City in the Necrons campaign.
The Jaws of Defeat	Complete the third act of the Adeptus Mechanicus campaign.
The Master	Complete a mission without losing any units with Ominekh.
The Shield	Have Obasis tank 15 damage in a single skirmish.
The Thunder	Use four skills in a single turn with Phekon.
The Wrath	Kill three units in a single turn with Amukah.
There is Only War	Kill 1,000 enemy units.
Usurpation	Complete the first act of the Necrons campaign.
Vindication	Complete the third act of the Necrons campaign.