Games like UNCULT
Games like UNCULT include OMORI, Undertale, OneShot, The Test, and No, I'm not a Human. We matched them by the tags players give UNCULT on Steam (Indie, Psychological Horror, Pixel Graphics, Story Rich, and Multiple Endings): closest matches first, and among equally close ones the better-known games.

OMORI
Shared: Psychological Horror · Indie · Story Rich

Undertale
Shared: Story Rich · Pixel Graphics · Multiple Endings

OneShot
Shared: Indie · Pixel Graphics · Story Rich

The Test
Shared: Story Rich · Pixel Graphics · Multiple Endings

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

Milk outside a bag of milk outside a bag of milk
Shared: Psychological Horror · Pixel Graphics · Indie

Impostor Factory
Shared: Story Rich · Pixel Graphics · Psychological Horror

Ib
Shared: Pixel Graphics · Indie · Story Rich

The Hex
Shared: Indie · Story Rich · Psychological Horror

LISA: The Painful
Shared: Psychological Horror · Indie · Story Rich

Back to the Dawn
Shared: Pixel Graphics · Story Rich · Choices Matter

To the Moon
Shared: Indie · Story Rich · Pixel Graphics

Tales of the Black Forest
Shared: Pixel Graphics · Indie · Story Rich

NEEDY STREAMER OVERLOAD
Shared: Psychological Horror · Pixel Graphics · Multiple Endings

DISTRAINT: Deluxe Edition
Shared: Indie · Psychological Horror · Pixel Graphics

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

Firework
Shared: Indie · Psychological Horror · Mystery

KinitoPET
Shared: Psychological Horror · Indie · Multiple Endings

Scarlet Hollow
Shared: Psychological Horror · Choices Matter · Story Rich

Unheard - Voices of Crime
Shared: Thriller · Mystery · Indie

Oxenfree
Shared: Story Rich · Indie · Choices Matter

Heartbound
Shared: Indie · Story Rich · Pixel Graphics

Raging Loop
Shared: Psychological Horror · Indie · Mystery

Roadwarden
Shared: Indie · Pixel Graphics · Story Rich