Here is the full list of all 35 Runespell: Overture achievements.
Finish the game
Defeat Gullveig
Discover all major questlines in the game
Defeat two Wardens stones
Obtain all powercards
Active a Powercard 100 times
Survive Wyrd Sister's Time Stop
Collect 10000 hacksilver in the game
Recruit all allies
Defeat Warghul
Defeat Dethgar and Ragnar
Win 15 battles in a row
Deal in total more than 10 000 points of damage
Use 7 card combinations in one battle
Win 10 battles in a row
Active a Powercard 50 times
Defeat Berendur twice
Deal in total more than 5000 points of damage
Win 20 battles without leaving the game
Win against an opponent with only 1 HP left on player side
Collect 1000 hacksilver in the game
Win 10 battles without leaving the game
Open 5 Treasure boxes
Active a Powercard 10 times
Deal in total more than 1000 points of damage
Win 5 battles without leaving the game
Win 7 battles without using any Powercards
Use 5 card combinations in one battle
Win 5 battles without using any Powercards
Win 5 battles in a row
Win 3 battles without using any Powercards
Collect 100 hacksilver in the game
Use 3 card combinations in one battle
Unlock all achievements
Play all battles once