Here is the full list of all 27 Highlands achievements.
Execute Ivar Demeryon in Bridgetown.
Rescue Sophia and her mechanics in 15 turns or less in Chapter 4, then complete the main objective.
Prevent the Warlords from leaving the Elevator sector in Chapter 3.
Kill 300 enemies.
Craft 10 items.
Attack an enemy with a Molotov Cocktail.
Activate all three types of resources.
End a battle with a Double Strike.
Craft your first item.
Complete Chapter 1 without recruiting any character in a tavern.
Complete the prologue.
Complete the game on the Casual or Normal difficulty level.
Complete the game on the Challenging difficulty level.
Complete the game on the Brutal difficulty level.
Complete Chapter 2 and leave no enemy alive.
Protect the heirs of Arislaan from damage during battle in Chapter 5.
Complete Chapter 6 without using Eldrich, Grigori, or Meregan in battle.
Capture all four factories on the same turn in Chapter 7.
Raise all the heirs of Arislaan to level 10.
Survive an attack that deals 20 or more damage with only 1 Combat Point left.
Win a battle against an enemy that has as many Combat Points as you.
Raise a character's Combat Points to 75 in battle.
Deal 150 damage or more in a single strike.
Craft 50 items.
Craft 100 items.
Kill 750 enemies.
Kill 1500 enemies.