The Shipyard of the Fallen is a small area of Helheim in God of War Ragnarok that you briefly visit while completing the Reunion objective on The Path’s main story quest line.
You travel to Helheim as Kratos and Atreus in search of Garm, the “hound of Hel” that Atreus set free during the previous story quest, Unleashing Hel. Atreus is not currently known as “Loki.”
There are no collectibles in The Shipyard of the Fallen, but there is a challenging battle with a Hel-Traveller, followed by a challenging gate puzzle where you must use Kratos’ Leviathan Axe and Atreus’ Sigil Arrows in precisely the right order to open a gate and keep it open.
How to complete God of War Ragnarok’s Shipyard of the Fallen gate puzzle
You’ll discover a gate blocking your path after you’ve vanquished the Hel-Traveller and looted his corpse. The gate on the left can be opened by turning the wheel, but once you release it, the gate closes and you are unable to pass.
You need to freeze the gate’s mechanism, but you can’t get at it with your Leviathan Axe or Atreus’ Sigil Arrows because it’s protected by an iron mesh.
Using Atreus’ Sigil Arrows, you can start a chain reaction that stops the gate from closing and freezes the locking mechanism, allowing the two of you to pass through.
Shoot three Sigil Arrows evenly spaced along the wooden beam extending above the mechanism using L2 and Square. Next, take hold of the wheel and lower it as far as possible.
Three Sigils should now be concealed beneath the iron mesh, and one should be visible above it. Use L2 and R2 to hurl your Leviathan Axe at the exposed Sigil while holding onto the wheel.
The ice magic should spread from one of your sigils to the other and freeze the gate’s mechanism if you placed them precisely. The gate will therefore remain open when you release the wheel, allowing you to pass through.