You will get this achievement when going for the No Stone Left Unturned & Completionist achievements-
There are great solutions for those, but as a backup here is a video showing all of the achievements/collectibles:
Timestamps by the video creator:
"All collectibles are spread across multiple levels, time stamps
-1:22 - Level 1
-16:35 - Level 2
-29:13 - Level 3
-53:10 - Level 4
-1:16:19 - Level 5
-1:22:45 - Level 6"
Here are screenshots from a Steam guide which may provide additional context:
(Scroll down)https://steamcommunity.com/sharedfiles/filedetails/?id=15895...Archive links for later:
https://web.archive.org/web/20220000000000*/https://steamcom...https://archive.ph/dHczY