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