Games like 13 Steps
Games like 13 Steps include Five Nights at Freddy's: Security Breach, Five Nights at Freddy's: Secret of the Mimic, Little Nightmares II, Stray, and Little Nightmares. We matched them by the tags players give 13 Steps on Steam (Horror, Transhumanism, Robots, Stealth, and Puzzle): closest matches first, and among equally close ones the better-known games.

Five Nights at Freddy's: Security Breach
Shared: Horror · Robots · Stealth

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Robots · Adventure

Little Nightmares II
Shared: Horror · Puzzle · Adventure

Stray
Shared: Atmospheric · Robots · Adventure

Little Nightmares
Shared: Horror · Atmospheric · Puzzle

Amnesia: Rebirth
Shared: Horror · Puzzle · Action-Adventure

Inside the Backrooms
Shared: Horror · Puzzle · Psychological Horror

Amnesia: The Dark Descent
Shared: Horror · Puzzle · Atmospheric

SOMA
Shared: Horror · Atmospheric · Psychological Horror

Lethal Company
Shared: Horror · Exploration · Atmospheric

Poppy Playtime
Shared: Horror · Puzzle · Psychological Horror

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

Outlast
Shared: Horror · Atmospheric · Psychological Horror

Hello Neighbor 2
Shared: Horror · Puzzle · Adventure

Outer Wilds
Shared: Exploration · Atmospheric · Puzzle

R.E.P.O.
Shared: Horror · Stealth · Robots

The Talos Principle
Shared: Puzzle · Atmospheric · Robots

Backrooms: Escape Together
Shared: Horror · Atmospheric · Psychological Horror

SILENT HILL: Townfall
Shared: Horror · Adventure · Exploration

In Sound Mind
Shared: Horror · Puzzle · Atmospheric

The Outlast Trials
Shared: Horror · Stealth · Psychological Horror

ROUTINE
Shared: Horror · Atmospheric · Puzzle

Alien: Isolation
Shared: Horror · Stealth · Atmospheric

Penumbra: Black Plague Gold Edition
Shared: Horror · Stealth · Adventure