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 2 as Luavira Heartwing
Lose a Battle as Luavira Heartwing
Win an Elite Battle as Luavira Heartwing
Win a Battle as Luavira Heartwing
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
Win a Battle without Haunting any Village
Load a User Created Mod
Reach Level 2 as Mirabella the Doll
Lose a Battle as Mirabella the Doll
Use Redraw when you have 8 cards in your hand
Use Redraw when you have 6 cards in your hand
Win an Elite Battle as Mirabella the Doll
Win a Battle as Mirabella the Doll
Reach Level 2 as Number 7
Lose a Battle as Number 7
Finish 2nd sector for the 1st time in campaign mode
Defeat Sultana Al'Noobi in Genie Form
Play 5 Cards in 10 seconds
Have 45 Units on the battlefield at the same time
Have 7 Cards in hand
Redraw your hand
Finish 1st sector for the 1st time in campaign mode
Win a Battle after Enemy Reinforcements have arrived
Defeat Lord Balderdash and his Yeti
Upgrade a Squad Card
Have 30 Units on the battlefield at the same time
Win a Battle in under 180 seconds
Win an Elite Battle as Number 7
Change the direction of a Signpost in Battle
Upgrade a Utility Card
Upgrade a Spell Card
Win a Battle in under 90 seconds
Win a Battle without your Mana ever reaching 100%
Win a Battle as Number 7
Start your first Game
Haunt a Village
Allow a Battle to last 8 minutes
Reach Level 10 as Mirabella the Doll
Reach Level 10 as Luavira Heartwing
Play 10 Cards in 10 seconds
Have 10 Cards in hand
Use Triple Cast on a Perk Utility Card