Here is the full list of all 29 Odallus: The Dark Call achievements.
Completed 100% of the game in normal mode.
Found all Heart Pieces.
Found all Weapon Bags.
Found the Combat Armor.
Completed the game.
Obtained 10.000 orbs (total) in a single game.
Spend 6.000 total orbs on the merchant.
Found the Dark Armor.
Obtained all shards.
Beat the “Frozen Mines” level.
Opened all level paths.
Beat the “Aqueducts Area 2” level.
Found the Silver Claymore
Beat the “Dark Forest Area 2” level.
Obtained all relics.
Beat the “Underground Temple” level.
Reach the final level blocked path.
Beat the “Devil’s Peak” level.
Play a game session for 2 hours.
Found the Steel Claymore.
Beat the “Aqueducts” level.
Beat the “Dark Forest” level.
Beat the “Town” level.
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Beat the entire game only using Haggis' Sword.
Beat the entire game only using Hunting Clothes.
Completed the game in less than 2 hours.
Completed the game in "Veteran Mode".
Completed 100% of the game in "Veteran Mode".