There are a total of 10 Optional Photos that you will need to find in order to obtain this. You can "Play Episodes" and select specific parts of the Episode in order to find the missing optional photos through
collectibles mode. There is also a counter on this screen to help you figure it out.
The optional photo locations can be seen below:
[
0:17] - Optional Photo #1
[
0:39] - Optional Photo #2
[
1:04] - Optional Photo #3
[
2:06] - Optional Photo #4
[
2:36] - Optional Photo #5
[
3:00] - Optional Photo #6
[
3:42] - Optional Photo #7
[
4:26] - Optional Photo #8
[
5:15] - Optional Photo #9
[
5:43] - Optional Photo #10
You will also unlock the following achievements along the way:
*Posting for MAKA91, because is only playing the Xbox One version.