Games like Scary Game
Games like Scary Game include Firewatch, Getting Over It with Bennett Foddy, Poppy Playtime, The Stanley Parable, and Portal 2. We matched them by the tags players give Scary Game on Steam (Dark Comedy, Horror, Singleplayer, Funny, and Comedy): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Singleplayer · Adventure · Atmospheric

Getting Over It with Bennett Foddy
Shared: Singleplayer · Horror · Funny

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

The Stanley Parable
Shared: Comedy · Funny · Indie

Portal 2
Shared: Singleplayer · Dark Humor · Funny

Little Inferno
Shared: Singleplayer · Funny · Indie

Little Nightmares II
Shared: Horror · Singleplayer · Adventure

Scary Game 2: The Mad Shepherd
Shared: Dark Comedy · Funny · Horror

Outlast
Shared: Horror · Singleplayer · First-Person

POSTAL 2
Shared: Dark Humor · Funny · Comedy

Dark Deception
Shared: Horror · Singleplayer · First-Person

THE CORRIDOR
Shared: Singleplayer · Comedy · Funny

Little Nightmares
Shared: Horror · Singleplayer · Adventure

Garry's Mod
Shared: Funny · Singleplayer · Casual

High On Life
Shared: Singleplayer · Comedy · Dark Humor

Jazzpunk: Director's Cut
Shared: Comedy · Funny · Indie

Layers of Fear (2016)
Shared: Horror · Singleplayer · Indie

Ultimate Custom Night
Shared: Horror · Singleplayer · Indie

South Park™: The Stick of Truth™
Shared: Comedy · Funny · Singleplayer

Bendy and the Dark Revival
Shared: Horror · Singleplayer · Indie

Lethal Company
Shared: Horror · Funny · First-Person

POSTAL 4: No Regerts
Shared: Singleplayer · Dark Humor · Adventure

Who's Your Daddy?!
Shared: Funny · Comedy · Dark Humor

The Looker
Shared: Funny · Comedy · Singleplayer