Here is the full list of all 29 Odallus: The Dark Call achievements.
Completed the game.
Completed 100% of the game in normal mode.
Obtained 10.000 orbs (total) in a single game.
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.
Beat the “Underground Temple” level.
Obtained all relics.
Reach the final level blocked path.
Found the Steel Claymore.
Beat the “Devil’s Peak” level.
Beat the “Dark Forest Area 2” level.
Found the Combat Armor.
Play a game session for 2 hours.
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".