Full list of all 26 Metal March achievements.
The base game contains 9 achievements, and there are 2 DLC packs containing 17 achievements.
Eliminate first region boss above normal difficulty
Eliminate fourth region boss above normal difficulty
Eliminate fifth region boss above normal difficulty
Complete the game on above easy difficulty
Complete the game on above normal difficulty
Complete the game on above hard difficulty
Complete 4 entire region above normal level of difficulty
Successful "Close and open" on "Black Chestbox" event 2 times in a row
Winning a game without curing lost troops in combat
Win battles without losing troops
Gain one of the highest-rated relics
Win a game with a Human Empire
Win a game with a Forest Elf
Win a game with a Volcanics
Win a game with a Progenies of Shadow
Win a game with a Necropolis
Win a game with a Savage Unites