Here is the full list of all 32 Mercenaries Saga 2 -Order of the Sliver Eagle- achievements.
Unlock all Achievements
Clear Chapter 3: In Search of Erni
Clear Chapter 4: Schpette Village
Clear Chapter 6: Ambush
Clear Chapter 9: Cleanup, and…
Clear Chapter 11: Vengeful Girl
Clear Chapter 16: Arm Dealer
Clear Chapter 17: For a War Friend…
Clear Chapter 20: Unexpected Crisis
Clear Chapter 22: Quiet Morning
Clear Chapter 26: Dragon's Den
Clear Chapter 29: Once Again…
Clear Chapter 30: The Truth
Clear Chapter 31: God’sArsenal
Clear Chapter 32
Clear the other version of Chapter 32
Trade a puzzle piece for rare equipment
Create a magic item through synthesis
Synthesize 25000G worth of magic items
Clear stage EX01
Clear stage EX02
Clear stage EX03
Clear stage EX04
Clear the Dungeon of Trials
Equip a full mascot costume set
Level up a character to Lv.99
Class change a character to an Intermediate class
Class change a character to an Advanced class
Class change a character to a Special class
Clear the game in HARD difficulty
Clear the game in MANIAC difficulty