Full list of all 27 The Legend of Heroes: Trails in the Sky achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Complete Chapter 4.
Defeat 2nd Lieutenant Lorence during the battle before the final dungeon.
Open all orbment slots for each character.
Collect 1,000 of each Sepith.
Exterminate all 'Big Monsters' along the roads.
Complete Chapter 3.
Complete Chapter 2.
Complete Chapter 1.
Complete the Prologue.
Defeat one type of Shining Pom for each chapter.
Fill the Recipe Book.
Complete all quests at the school campus.
Complete all requests from the Bracer Guild.
Collect every weapon available in the game.
Collect every armor available in the game.
Purchase and read all chapters of Carnelia.
Read every issue of the Liberl News.
Collect every Quartz available in the game.
Collect 3,000 of each Sepith.
Opt to fish all ten times at Valleria.
Return a certain blond-haired idiot to his boon companion.
Open all non-story-related treasure chests and get every chest phrase.
Obtain the maximum amount of Bracer Points and achieve the highest Bracer Rank.
Choose Tita, Kloe and/or Schera to join Joshua and Estelle in the Final Dungeon.
Choose Agate, Olivier and/or Zane to join Joshua and Estelle in the final dungeon.
Opt to fight the final battle without any use of S-Crafts.
Complete all achievements.