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 the Dark Armor.
Found all Heart Pieces.
Found all Weapon Bags.
Opened all level paths.
Found the Silver Claymore
Beat the “Aqueducts Area 2” level.
Obtained all relics.
Beat the “Underground Temple” level.
Reach the final level blocked path.
Beat the “Devil’s Peak” level.
Play a game session for 2 hours.
Found the Steel Claymore.
Found the Combat Armor.
Beat the “Dark Forest Area 2” level.
Beat the “Aqueducts” 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".