Full list of all 46 Merge & Blade achievements worth 1,700 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game.
The base game contains 34 achievements worth 1,000 Gamerscore, and there are 5 DLC packs containing 12 achievements worth 700 Gamerscore.
Complete all campaign stages
Complete all challenger stages
Clear 10th defense stage
Clear 20th defense stage
Merge 6 units at the same time
Merge 8 units at the same time
Make 3 merges in one turn
Make 5 merges in one turn
Defeat 500 goblin monsters
Defeat 500 ork monsters
Reach lv.5 with Farmer class
Reach lv.5 with Blacksmith class
Reach lv.5 with Footman class
Reach lv.5 with Rogue class
Reach lv.5 with Archer class
Reach lv.5 with Priest class
Reach lv.5 with Spearman class
Reach lv.5 with Barbarian class
Reach lv.5 with Alchemist class
Reach lv.5 with Wizard class
Reach lv.5 with General class
Make a rogue
Make a priest
Make a spearman
Make a generals
Reach boot camp level 5
Reach transport route level 5
Reach tactical book level 5
Reach enlistment papers level 5
Defeat a Mud Golem
Defeat a Ice Golem
Defeat a Fire Golem
Defeat a Stone Golem
Defeat a Wood Golem
Play as a Hero at least 5 times
Play as a Puppy at least 5 times
Play as a Berserker at least 5 times
Reach Round 10 in the Mineral Mine
Play as a King at least 5 times
Play as a Card Master at least 5 times
Play as a Theif at least 5 times
Play as a Dictator at least 5 times
Play as a Explorer at least 5 times
Play as a Prophet at least 5 times
Play as a Elvenarcher at least 5 times
Reach Round 10 of Final Night