Games like SAIBI
Games like SAIBI include Firewatch, Ready or Not, Layers of Fear (2016), Poppy Playtime, and The Cabin Factory. We matched them by the tags players give SAIBI on Steam (Horror, Adventure, Immersive Sim, Walking Simulator, and Realistic): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · First-Person

Ready or Not
Shared: Realistic · Horror · Singleplayer

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

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

The Cabin Factory
Shared: Horror · Walking Simulator · Immersive Sim

The Beast Inside
Shared: Horror · Adventure · First-Person

Outlast
Shared: Horror · First-Person · Singleplayer

The Forest
Shared: Horror · Adventure · First-Person

Visage
Shared: Horror · Adventure · First-Person

Blair Witch
Shared: Horror · Adventure · First-Person

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

The Exit 8
Shared: Horror · Walking Simulator · Immersive Sim

Bendy and the Dark Revival
Shared: Horror · Adventure · First-Person

VERGE:Lost chapter
Shared: Horror · Walking Simulator · Adventure

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

Among the Sleep - Enhanced Edition
Shared: Horror · Adventure · Indie

The Death | Thần Trùng
Shared: Horror · Adventure · Realistic

The Hat Man: Shadow Ward
Shared: Horror · Adventure · First-Person

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

Welcome to Kowloon
Shared: Horror · Adventure · Walking Simulator

There Exists Nobody
Shared: Immersive Sim · Adventure · Walking Simulator

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

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

Spooky's Jump Scare Mansion: HD Renovation
Shared: Horror · Adventure · First-Person