In Hellblade 2 there are 2 collectible types. The newer of the 2 comes in the form of hidden faces, which are usually stone/rock formations that look like faces. If you use Focus on these hidden faces in the game world, a path will open and lead you to a tree, which contains one of the game's Landdisasteinar Stories.

There are 17 to collect in all (starting in chapter 2) and can be found in the following chapters:

• Chapter 1 - Reykjanesta - No Faces
• Chapter 2 - Freyslaug - 2 x Faces
• Chapter 3 - Raudholar - 5 x Faces
• Chapter 4 - Huldufolk - 4 x Faces
• Chapter 5 - Bardarvik - 6 x Faces
• Chapter 6 - Borgarvirki - No collectibles 

You can find them all using the following guides:

• Senua’s Saga: Hellblade 2: - All Stone Faces Locations
• Senua’s Saga: Hellblade 2 - All Collectibles Locations (Lorestangirs & Faces)

Once you’ve revealed the secret path (you don’t even actually need to interact with the tree for the achievement, but you do if you want to view the Landdisasteinar Stories from the Extras menu) for all 17 locations, the ‘Glimpse of the Gods’ achievement is all yours.