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