Games like SHE WAS 98
Games like SHE WAS 98 include Mouthwashing, Outlast, Layers of Fear (2016), Poppy Playtime, and No, I'm not a Human. We matched them by the tags players give SHE WAS 98 on Steam (Horror, Indie, Atmospheric, Psychological Horror, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

Outlast
Shared: Horror · Atmospheric · First-Person

Layers of Fear (2016)
Shared: Horror · Atmospheric · Psychological Horror

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror

No, I'm not a Human
Shared: Horror · Indie · Psychological Horror

MiSide
Shared: Psychological Horror · Horror · First-Person

Outlast 2
Shared: Horror · Psychological Horror · First-Person

SOMA
Shared: Horror · Atmospheric · Psychological Horror

Visage
Shared: Horror · Psychological Horror · Dark

Garten of Banban
Shared: Horror · Psychological Horror · First-Person

From The Darkness
Shared: Horror · Indie · Psychological Horror

What Remains of Edith Finch
Shared: Atmospheric · Walking Simulator · First-Person

Welcome to Kowloon
Shared: Horror · Atmospheric · Psychological Horror

Blair Witch
Shared: Horror · Indie · Psychological Horror

Amnesia: A Machine For Pigs
Shared: Horror · Atmospheric · Walking Simulator

Phasmophobia
Shared: Horror · Psychological Horror · First-Person

Still Wakes the Deep
Shared: Horror · Psychological Horror · Walking Simulator

Firewatch
Shared: Atmospheric · Walking Simulator · First-Person

Summer of '58
Shared: Horror · Atmospheric · Psychological Horror

Buckshot Roulette
Shared: Horror · Dark · Indie

Sally Face - Episode One
Shared: Indie · Horror · Psychological Horror

Slender: The Arrival
Shared: Horror · Indie · First-Person

Five Nights at Freddy's
Shared: Horror · Indie · Psychological Horror

Garten of Banban 2
Shared: Horror · Psychological Horror · First-Person