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