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