What are some non horror games that unexpectedly suddenly become horror games either entirely or during certain sections?

I was playing Shadow of the Tomb Raider and that game which has been an action adventure Uncharted, Indiana Jones type experience for the last 2 entries in the trilogy suddenly in this game decides to add some horror elements with the 3rd entry. Some very creepy sections and tombs to begin with and now there are killer jungle demon creatures. This sudden change in tone and atmosphere is so cool and I love it.

Got me thinking about other games that aren't listed as horror games but could very well be. First that comes to kind for me is Subnautica