Here is the full list of all 44 Trials of Mana achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
Obtain all achievements.
Become a master thief.
Play with all six main characters.
Complete Hawkeye's story.
Defeat Archdemon.
Become a master magician.
Become a master cleric.
Complete Angela's story.
Complete Charlotte's story.
Defeat Dark Lich.
Purchase nitromyte for the listed price.
Learn all abilities as any character.
Learn 20 abilities as any character.
Stop the end of the world.
Defeat Anise on hard.
Accumulate at least 500,000 lucre.
Max out magic pot level.
Defeat Black Rabite.
Become a master fighter.
Become a master guard.
Become a master swordsman.
Complete Duran's story.
Complete Kevin's story.
Complete Riesz's story.
Complete Chapter 6.
Defeat Mondoragon.
Find Li'l Cactus in all possible areas.
Complete Chapter 5.
Accumulate at least 100,000 lucre.
Open 200 treasure boxes.
Complete Chapter 4.
First ride on Flammie.
Complete Chapter 3.
Complete Chapter 2.
First ride on Vuscav.
First class switch.
Open 100 treasure boxes.
Complete Chapter 1.
First cannon ride.
First encounter with Li'l Cactus.
First time learning a companion's chain ability.
First time learning a chain ability from an unexpected acquaintance.
First time learning an ability.
First time planting a seed.