Here is the full list of all 38 Souldiers achievements.
Complete the game as a Caster.
Complete the game as all three classes.
Unlock all skills.
Destroy 10,000 environmental objects.
Complete the game as an Archer.
Finish a game on Game+ mode.
Defeat 5,000 enemies.
Complete all side quests.
Collect all secondary weapons.
Complete the game on Warrior mode.
Complete the game as a Scout.
Complete the Bestiary in your Encyclopaedia.
Defeat Beigon on Soldier or Warrior mode.
Upgrade your protection the highest level.
Upgrade your weapon to the highest level.
Reveal 100% of every map.
Find all of the hidden rooms.
Defeat Agginox on Soldier or Warrior mode.
Defeat all Dark Warriors.
Defeat Galath a second time.
Defeat 50 enemies using secondary weapons.
Collect all Dark Crystals.
Defeat Ratatosk on Soldier or Warrior mode.
Collect all orbs in the game.
Destroy 3,000 environmental objects.
Defeat Project S on Soldier or Warrior mode.
Defeat Brigard.
Defeat Sangrigor.
Defeat Birk on Soldier or Warrior mode.
Use 100 potions.
Discover 50 hidden rooms.
Defeat Babylon on Soldier or Warrior mode.
Defeat 1,000 enemies.
Inflict altered states on your enemies 50 times.
Defeat all Royal Scorpions.
Defeat Iktala on Soldier or Warrior mode.
Defeat the Minotaur
Be revived by the Valkyries after falling in combat.