Games like GeraScopia
Games like GeraScopia include DREDGE, Poppy Playtime, ANIMAL WELL, Firework, and Firewatch. We matched them by the tags players give GeraScopia on Steam (Mystery, Horror, Atmospheric, 2D Platformer, and Noir): closest matches first, and among equally close ones the better-known games.

DREDGE
Shared: Mystery · Atmospheric · Exploration

Poppy Playtime
Shared: Horror · Mystery · Singleplayer

ANIMAL WELL
Shared: Horror · Platformer · Pixel Graphics

Firework
Shared: Horror · Mystery · Atmospheric

Firewatch
Shared: Atmospheric · Mystery · Adventure

Outer Wilds
Shared: Mystery · Atmospheric · Exploration

Little Nightmares
Shared: Horror · Atmospheric · Singleplayer

Rain World
Shared: Atmospheric · Platformer · Pixel Graphics

What Remains of Edith Finch
Shared: Atmospheric · Mystery · Exploration

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

Sally Face - Episode One
Shared: Horror · Mystery · Psychological Horror

DISTRAINT: Deluxe Edition
Shared: Horror · Atmospheric · Psychological Horror

INSIDE
Shared: Atmospheric · Horror · 2D Platformer

Little Nightmares II
Shared: Horror · Atmospheric · Singleplayer

OMORI
Shared: Psychological Horror · Horror · Pixel Graphics

The Room Two
Shared: Mystery · Atmospheric · Horror

SOMA
Shared: Horror · Atmospheric · Psychological Horror

INMOST
Shared: Atmospheric · Pixel Graphics · Exploration

Hollow Knight
Shared: Platformer · Atmospheric · Exploration

Layers of Fear (2016)
Shared: Horror · Atmospheric · Psychological Horror

Celeste
Shared: 2D Platformer · Pixel Graphics · Platformer

Iron Lung
Shared: Horror · Atmospheric · Psychological Horror

Amnesia: A Machine For Pigs
Shared: Horror · Atmospheric · Mystery

Stray
Shared: Atmospheric · Horror · Adventure