This guide shows how to solve the favor (Sub-Quest) The Broken Prison in God of War Ragnarok. The Broken Prison is a Favor (Side Quest) for Kratos in God of War Ragnarok.
Starting Point: The Broken Prison
After completing the main story, a new path to the left of the Raven Tree opens up. Follow this path to reach the Aesir Prison Wreckage. The Broken Prison is started automatically upon crossing the newly made bridge at The Raven Tree in Niflheim after completing the story.
The Broken Prison Walkthrough
After finishing the main tale, a new path to the left of the Raven Tree becomes available. Use this path to reach the Aesir Prison Wreckage. Head inside the prison and eliminate the Einherjar.
Search the prison
Use the spear weapon to reach all the bottom Floors and Eliminate all the enemies. There is also a Nornir Chest in the Aesir Prison Wreckage
Finally, Go to the bottom floor and open a prison cell to find Tyr.
Interact with him to complete this Sub-Quest.