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