Games like SIDE EFFECTS
Games like SIDE EFFECTS include Buckshot Roulette, CloverPit, Phasmophobia, Pacify, and The Outlast Trials. We matched them by the tags players give SIDE EFFECTS on Steam (Strategy, Gambling, Horror, Dark, and 3D): closest matches first, and among equally close ones the better-known games.

Buckshot Roulette
Shared: Gambling · Dark · Horror

CloverPit
Shared: Gambling · Strategy · Horror

Phasmophobia
Shared: Horror · Multiplayer · Dark

Pacify
Shared: Horror · Multiplayer · Dark

The Outlast Trials
Shared: Horror · Multiplayer · First-Person

Liars Bar
Shared: Multiplayer · PvP · Indie

Escape the Backrooms
Shared: Horror · Multiplayer · First-Person

Demonologist
Shared: Horror · Multiplayer · Dark

Outlast
Shared: Horror · First-Person · Dark

Inscryption
Shared: Horror · Dark · Strategy

Poppy Playtime
Shared: Horror · Dark · First-Person

Dead by Daylight
Shared: Horror · Multiplayer · First-Person

DEVOUR
Shared: Horror · Multiplayer · Dark

Ultimate Custom Night
Shared: Horror · Strategy · Dark

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

Outlast 2
Shared: Horror · Dark · First-Person

Inside the Backrooms
Shared: Horror · Multiplayer · First-Person

Visage
Shared: Horror · Dark · Multiplayer

Mouthwashing
Shared: Horror · Indie · Dark

Gorilla Tag
Shared: Multiplayer · Horror · First-Person

R.E.P.O.
Shared: Horror · Multiplayer · 3D

Five Nights at Freddy's 2
Shared: Horror · Dark · First-Person

Slender: The Arrival
Shared: Horror · Dark · First-Person

From The Darkness
Shared: Horror · Dark · Multiplayer