Games like Betweenside
Games like Betweenside include No, I'm not a Human, OneShot, Tiny Bunny, Sally Face - Episode One, and What Remains of Edith Finch. We matched them by the tags players give Betweenside on Steam (Indie, Dark, Choices Matter, Interactive Fiction, and Story Rich): closest matches first, and among equally close ones the better-known games.

No, I'm not a Human
Shared: Indie · Choices Matter · Story Rich

OneShot
Shared: Indie · Story Rich · Choices Matter

Tiny Bunny
Shared: Dark · Story Rich · Choices Matter

Sally Face - Episode One
Shared: Indie · Story Rich · Dark

What Remains of Edith Finch
Shared: Story Rich · Atmospheric · Exploration

Beholder
Shared: Choices Matter · Dark · Story Rich

Little Misfortune
Shared: Indie · Choices Matter · Story Rich

CARIMARA: Beneath the forlorn limbs
Shared: Story Rich · Exploration · Indie

INSIDE
Shared: Dark · Indie · Story Rich

Undertale
Shared: Choices Matter · Story Rich · Indie

The Life and Suffering of Sir Brante
Shared: Choices Matter · Story Rich · Interactive Fiction

SOMA
Shared: Dark · Story Rich · Atmospheric

SUNLESS SEA
Shared: Dark · Exploration · Story Rich

Disco Elysium - The Final Cut
Shared: Choices Matter · Story Rich · Atmospheric

Vampire: The Masquerade - Coteries of New York
Shared: Indie · Interactive Fiction · Story Rich

Esoteric Ebb
Shared: Choices Matter · Story Rich · Interactive Fiction

Road 96
Shared: Choices Matter · Story Rich · Atmospheric

INMOST
Shared: Indie · Story Rich · Exploration

Mouthwashing
Shared: Indie · Story Rich · Atmospheric

Amnesia: A Machine For Pigs
Shared: Story Rich · Atmospheric · Exploration

Oxenfree
Shared: Choices Matter · Story Rich · Indie

Gone Home
Shared: Indie · Exploration · Story Rich

Outer Wilds
Shared: Exploration · Story Rich · Indie

Firewatch
Shared: Story Rich · Atmospheric · Indie