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