Here is the full list of all 40 Driftland: The Magic Revival achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Win a Multiplayer Game
Discover 1000 resources with Geology.
Build 1000 structures (bridges no included).
Open 2000 treasures.
Recruit 1000 Heroes in total.
Make your Heroes tame 500 flying beasts.
Win the Final Campaign
Win your 5th Single Player game as Wild Elves.
Build 1000 bridges.
Win your 3rd Single Player game as Wild Elves.
Win your 1st Single Player game as Wild Elves.
Win your 5th Single Player game as Dwarves.
Unlock the Final Campaign
Win a Dwarves Campaign
Win your 3rd Single Player game as Dwarves.
Win your 1st Single Player game as Dwarves.
Win a Dark Elf Campaign
Win your 25th Single Player game as Dark Elves.
Win your 10th Single Player game as Dark Elves.
Win a Human Campaign
Discover 100 resources with Geology.
Win your 5th Single Player game as Dark Elves.
Make your Heroes tame 50 flying beasts.
Open 200 treasures.
Have 100 of enemy Heroes killed in total.
Recruit 100 Heroes in total.
Win your 25th Single Scenario as Humans
Build 100 bridges.
Build 100 structures (bridges not included).
Create an Empire of at least 20 islands.
Make your Heroes tame 5 flying beasts.
Recruit 10 Heroes in total.
Win your 10th Single Scenario as Humans.
Win your first Single Player game.
Win your 5th Single Scenario as Humans.
Open 20 treasures.
Discover 10 resources with Geology.
Build 10 bridges.
Complete the Tutorial.
Build 10 structures (bridges not included).