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