Games like Akai Onna
Games like Akai Onna include Layers of Fear (2016), MiSide, The Exit 8, Outlast, and Garten of Banban. We matched them by the tags players give Akai Onna on Steam (Walking Simulator, Horror, First-Person, Casual, and 3D): closest matches first, and among equally close ones the better-known games.

Layers of Fear (2016)
Shared: Horror · Walking Simulator · First-Person

MiSide
Shared: Horror · Psychological Horror · First-Person

The Exit 8
Shared: Walking Simulator · Horror · First-Person

Outlast
Shared: Horror · First-Person · Psychological Horror

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

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

Scanner Sombre
Shared: Walking Simulator · Horror · First-Person

From The Darkness
Shared: Horror · First-Person · Psychological Horror

The Death | Thần Trùng
Shared: Horror · Psychological Horror · Casual

Mouthwashing
Shared: Horror · Psychological Horror · Walking Simulator

The Cabin Factory
Shared: Horror · Walking Simulator · Psychological Horror

Escape the Backrooms
Shared: Horror · Psychological Horror · First-Person

Firewatch
Shared: Walking Simulator · First-Person · Atmospheric

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · Multiple Endings

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · First-Person

BABBDI
Shared: Walking Simulator · First-Person · Horror

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

Fears to Fathom - Woodbury Getaway
Shared: Horror · First-Person · Psychological Horror

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

The Boba Teashop
Shared: Horror · First-Person · Walking Simulator

Still Wakes the Deep
Shared: Horror · Walking Simulator · First-Person

Fears to Fathom® - Scratch Creek
Shared: Horror · Walking Simulator · Casual

September 7th
Shared: Horror · Walking Simulator · First-Person

Dollmare
Shared: Horror · First-Person · 3D