Memories in Stray are the main collectible that allow B12 to make sense of the world around you. Most memories are scattered throughout the different areas, and to find them all, you'll need to stray off the main path and explore. This page of IGN's Stray wiki guide has all memory locations in Stray — with a video showing all memories, how to find missed memories, and reveal what reward you get for finding all the memories.
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All Stray Memories
Watch the video below to see all the memories play out in Stray, or see the memory locations below if you want to find them yourself.
The table below showcases all the memories in Stray as they appear in B12's catalog. We've also highlighted the difference between which ones gain automatically through story events and which ones you'll need to seek out. Clicking on the memories will take you to the guide containing its location and the locations of any other memories in that area.
How to Find Missed Memories
If you missed any memories on your first pass through a chapter, you'll still be able to replay the chapter to get any of the memories again. On the game's title menu, you can view the chapter select screen. It will show you all the chapters and how many memories you've collected in each.
Simply select the chapter you wish to play again. You'll have to replay the chapter from the very beginning again. After getting the memory, you'll need to save the game in order to keep it. This happens automatically whenever you reach a checkpoint.
To confirm that the game saved, you keep an eye out for the little cat icon on the bottom left of the screen after you get the memory. You can also press pause to see the time since the last checkpoint. If for some reason the game didn't save after you picked up the memory, you'll have to continue playing through the chapter until you reach a checkpoint.
Reward for Getting All the Memories
Collecting all 27 memories earns you the "I Remember!" Trophy/Achieve. To express his gratitude, B12 will change your vest's color into a special tie-dye pattern.