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