Games like Hapunan
Games like Hapunan include Five Nights at Freddy's: Security Breach, MiSide, No, I'm not a Human, Escape the Backrooms, and The Coffin of Andy and Leyley. We matched them by the tags players give Hapunan on Steam (3D, Horror, Life Sim, Dark Comedy, and Choices Matter): closest matches first, and among equally close ones the better-known games.

Five Nights at Freddy's: Security Breach
Shared: Horror · 3D · First-Person

MiSide
Shared: Horror · 3D · Psychological Horror

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

Escape the Backrooms
Shared: Horror · 3D · First-Person

The Coffin of Andy and Leyley
Shared: Dark Comedy · Choices Matter · Story Rich

SOMA
Shared: Horror · Psychological Horror · Story Rich

Firewatch
Shared: Adventure · Story Rich · First-Person

SILENT HILL 2
Shared: Horror · Psychological Horror · Story Rich

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · First-Person · 3D

Outer Wilds
Shared: Exploration · Adventure · Story Rich

Lethal Company
Shared: Horror · First-Person · Exploration

Subnautica 2
Shared: Horror · Exploration · First-Person

SILENT HILL: Townfall
Shared: Horror · Adventure · 3D

CARIMARA: Beneath the forlorn limbs
Shared: Horror · 3D · Exploration

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

The Casting of Frank Stone™
Shared: Horror · Choices Matter · Adventure

Inside the Backrooms
Shared: Horror · Exploration · Psychological Horror

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

Poppy Playtime
Shared: Horror · First-Person · Singleplayer

Outlast
Shared: Horror · First-Person · Psychological Horror

What Remains of Edith Finch
Shared: Story Rich · Exploration · First-Person

The Forest
Shared: Horror · Adventure · First-Person

Road 96
Shared: First-Person · Choices Matter · Adventure

Slay the Princess — The Pristine Cut
Shared: Horror · Choices Matter · Story Rich