This achievement is earned for finding optional photo #6. If missed on the first run, you can "Play Episodes" and select specific parts of the Episode in order to find the missing optional photos through
collectibles mode. The following collectible is described and can be seen below:
[
3:48] - Optional Photo #6
In the junkyard, the school bus.
*Posting for MAKA91, because he is only playing the Xbox One version.