Hellblade: Senua's Sacrifice

This achievement is missable.

In Hellblade: Senua's Sacrifice, there are a total of 44 Lorestones that you will need to collect for this achievement. These collectibles are large standing stones that will typically be found along the main path through each chapter.

Each Lorestone has a glowing red-orange ring around it. Along the ring are a series of letters, followed by a dot; the letters represent each collectible and the dots mark the end of a chapter. The letters will turn white once you focus on the Lorestone. If you miss a Lorestone during your playthrough, its corresponding letter will remain orange. Take note that there is no chapter select; if you miss a Lorestone and complete a chapter, you will need to start a new playthrough (fortunately, already collected Lorestones will carry over into new playthroughs).

As to avoid an additional playthrough solely for collectibles, it's encouraged to follow the video guide below during your initial playthrough, courtesy of PowerPyx and free of any story spoilers, for the location of all 44 Lorestones in the game.