Games like Something in the Back
Games like Something in the Back include No, I'm not a Human, Mouthwashing, MiSide, Buckshot Roulette, and SILENT HILL 2. We matched them by the tags players give Something in the Back on Steam (Indie, Psychological Horror, Psychological, Singleplayer, and 3D): closest matches first, and among equally close ones the better-known games.

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

Mouthwashing
Shared: Psychological Horror · Indie · Atmospheric

MiSide
Shared: Psychological Horror · Singleplayer · 3D

Buckshot Roulette
Shared: Indie · Singleplayer · Psychological

SILENT HILL 2
Shared: Psychological Horror · Psychological · Atmospheric

Fran Bow
Shared: Psychological Horror · Indie · Singleplayer

DISTRAINT: Deluxe Edition
Shared: Indie · Psychological Horror · Singleplayer

Firework
Shared: Indie · Psychological Horror · Singleplayer

Five Nights at Freddy's
Shared: Singleplayer · Psychological Horror · Indie

Hellblade: Senua's Sacrifice
Shared: Psychological · Atmospheric · Singleplayer

Raging Loop
Shared: Psychological Horror · Indie · Psychological

Little Nightmares
Shared: Singleplayer · Atmospheric · Indie

Garten of Banban
Shared: Psychological Horror · Singleplayer · 3D

The Beginner's Guide
Shared: Indie · Atmospheric · Singleplayer

Sally Face - Episode One
Shared: Psychological Horror · Indie · Atmospheric

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

Layers of Fear 2 (2019)
Shared: Psychological Horror · Indie · Atmospheric

Outlast
Shared: Psychological Horror · Atmospheric · Singleplayer

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

Lost in Vivo
Shared: Psychological Horror · Indie · Psychological

CloverPit
Shared: Psychological Horror · 3D · Singleplayer

Static Dread: The Lighthouse
Shared: Indie · Psychological · Psychological Horror

The Test
Shared: Psychological Horror · Psychological · Singleplayer