Here is the full list of all 14 Hellblade: Senua's Sacrifice achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Defeat Surtr
Reaching the Gate for the first time
Defeat Valravn
Meet Hela for the first time on the Bridge
Complete the Blindness Shard Challenge
Complete the Tower Shard Challenge
Complete the Swamp Shard Challenge
Complete the Labyrinth Shard Challenge
Pull Gramr out of the Tree
Escape the Sea of Corpses
Enter Helheim
Defeat Fenrir
Confront Hela
Collect all of the Lorestones