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