God of War: Ragnarok - Helheim Collectibles

You will visit Helheim with Atreus, then later with Kratos. What you find with Atreus doesn't count, but I will write it anyway.

Docks of Vađgelmir

• Legendary chest 1/2: Falling Sky (Bow Ability) [Doesn't count towards 100%]
  Location: When you progress with Thrude you will reach a big box you will push and climb. When you climb it, turn left.
• Legendary chest 2/2: Wrath of the Wolf (Runic Summon) [Doesn't count towards 100%]
  Location: When you progress with Thrude again, you will reach a big box she will push and you will be able to graple on the upper ledge. When you climb down the chains, go left first and follow the path.

Helgrind

After you return back from here with Atreus, you will go back with Kratos afterwards.

• Odin's Ravens 1/2
  Location: Near letter "H" in Helheim on the map is a pillar you have to destroy with your spear. In the area left of it the raven is flying.
• Lore 1/2: Prayer to Hraesvelgr
  Location: When you end up on the lower platform where you have to shoot snow with your spear, check the opposite platform, climb on it and read the letters.
• Lore 2/2: Hraesvelgr
  Location: You will end up on this other side of this area after the boss and when you return during the next events. After a puzzle where you have to freeze the device you can find the stone tablet in front of you in that room.
• Odin's Ravens 2/2
  Location: Directly above Lore #2.

The Gleaming Bale

You can't miss it after Helgrind. 

When you defeat the big knight enemy with a big sword you will get Boon of Wrath (Amulet Enchantment), and Frozen Flame (Weapon Upgrade).

• Hell Tears 1/1: Grip of Healing Harmony (Axe Attachment), Frozen Spike (Weapon Upgrade)
  Location: You will find it on your way, it's the green portal you have to close. Let Atreus do it, and you defend by killing enemies around. This starts Hell to Pay Favour.
• Legendary Chest 1/1 Tame the Beast (Heavy Runic Attack) [Doesn't show on the map as collectible]
  Location: When you reach a bridge on which some undeads are walking, go down and right and shoot the spear to form a path on the ledge above. Climb up and jump across, and the chest will be in front of you.

Shipyard of the Fallen

You can't miss it after The Gleaming Bale. 

• Legendary Chest 1/1 Thrust of Thousand Soldiers (Light Runic Attack) [Doesn't show on the map as collectible]
  Location: On your way when you go through this area.

The Silent Clearing

You can't miss it after Shipyard of the Fallen. It's the big circle area on the north side of the map. 

• Legendary Chest 1/1: Onslaught Shield (Shield) [Doesn't show on the map as collectible]
  Location: After you defeat the boss go further and you will reach a room with a rotating device. On the right side is the chest. If this is your last shield, you will unlock the Phalanx trophy.

Hel's Perch

Area after The Silent Clearing.

• Nine Realms in Bloom 1/1: Flower 4/9
  Location: You will end up in one big room from which you have to grapple on the ledge above. Before doing so, shoot the spear from below to form a path on the right side up, and then grapple up, go right and find the flower on this path.