The weapon mechanism is only valid for map 2. The beginning of the story in the 1st map is the continuation of the 2nd map. First Person mode is only available for the 1st map. For the first person you need to hold the camera
Anatomy Of Fear
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 8103484 · public branch
Steam updated · First observed