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