Here is the full list of all 45 Necronator: Dead Wrong achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Reach Level 10 as Luavira Heartwing
Reach Level 10 as Mirabella the Doll
Reach Level 10 as Number 7
Finish 3rd sector for the 1st time in campaign mode
Defeat Flosshilde the Huntress and her mount
Haunt 100 Villages
Finish 2nd sector for the 1st time in campaign mode
Defeat Sultana Al'Noobi in Genie Form
Win an Elite Battle as Luavira Heartwing
Reach Level 2 as Luavira Heartwing
Win a Battle after Enemy Reinforcements have arrived
Win a Battle without Haunting any Village
Finish 1st sector for the 1st time in campaign mode
Defeat Lord Balderdash and his Yeti
Have 45 Units on the battlefield at the same time
Play 10 Cards in 10 seconds
Have 10 Cards in hand
Use Triple Cast on a Perk Utility Card
Use Redraw when you have 6 cards in your hand
Use Redraw when you have 8 cards in your hand
Lose a Battle as Luavira Heartwing
Allow a Battle to last 8 minutes
Play 5 Cards in 10 seconds
Win a Battle as Luavira Heartwing
Reach Level 2 as Mirabella the Doll
Lose a Battle as Mirabella the Doll
Upgrade a Spell Card
Win an Elite Battle as Mirabella the Doll
Have 30 Units on the battlefield at the same time
Have 7 Cards in hand
Upgrade a Utility Card
Win a Battle as Mirabella the Doll
Redraw your hand
Load a User Created Mod
Reach Level 2 as Number 7
Lose a Battle as Number 7
Upgrade a Squad Card
Win an Elite Battle as Number 7
Change the direction of a Signpost in Battle
Win a Battle in under 90 seconds
Win a Battle in under 180 seconds
Win a Battle without your Mana ever reaching 100%
Win a Battle as Number 7
Haunt a Village
Start your first Game