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