All Collectibles in Althjof's Rig

Odin's Raven: Upon reaching the top of the chain used to ascend to Althjof's Rig from the boat docking area, you will immediately see Odin's Raven.

Rune Lore: Head to the crane lift mechanism to the right of your entry point. Lower the lift using the mechanism two times so it aligns with the opposite platform. Go to this platform and use your Blades of Chaos to pull the lift towards you. Use the hook on the crane lift to reach the eastern side, where you'll find a red barrel next to a damaged wooden gate. Use a heavy ranged attack with your Blades of Chaos to ignite the barrel, destroying the gate and opening a new area. Deal with the frozen Draugr, then use the Blades of Chaos to climb the southern wall. From here, knock down the shield blocking the climb opposite where you first entered. Turn west, open the gate, turn right, and jump down. Find another barrel, ignite it with your Blades of Chaos, opening a path to your left. Climb the wall, jump west, and continue until you can jump and climb onto a platform. Look down at the weakened floor and dive through it by pressing the indicated button. After defeating the fire Draugr in the area below, locate the Rune Lore marking for The Squasher on the northern wall.

Mining Rig: After looting the Legendary Chest, return to the area where you fought the Fire Draugr. Look left for a lift hook and pull it up using the Blades of Chaos. Return to the crane lift mechanism and raise the lift to its highest position. Climb the wall to the left of the mechanism and use the platform/crane lift hook to reach the northeast side, near the mining rig furnace. Kick the chain down to your right, then climb the wall to reach the furnace. Defeat the Draugr and Grims, then interact with the Mining Rig furnace to shut it down.

Lore Scroll and Legendary Chest: From the mining rig furnace area, look to the southern wall for markings indicating a slideable section. Press the indicated button to slide across. Jump to the chain and kick it down. Climb down the chain and look west. You'll see the crane lift hook can be raised another level. Go back to the lift mechanism and raise the lift to its highest setting. Climb back up the chain and use your Blades of Chaos to jump using the hook on the lift. While in mid-air, press the indicated button again to lock onto the weakened wall ahead, causing Kratos to crash through to a hidden area containing the Lore Scroll and a Legendary Chest.