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