Games like You Left Us
Games like You Left Us include Mouthwashing, No, I'm not a Human, Poppy Playtime, Layers of Fear (2016), and What Remains of Edith Finch. We matched them by the tags players give You Left Us on Steam (Indie, Horror, Psychological Horror, Atmospheric, and Cold War): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Horror · Psychological Horror · Indie

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

Poppy Playtime
Shared: Horror · Singleplayer · Psychological Horror

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

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

SOMA
Shared: Horror · Psychological Horror · Atmospheric

Firework
Shared: Indie · Horror · Psychological Horror

Firewatch
Shared: Atmospheric · Indie · Singleplayer

Outlast
Shared: Horror · Atmospheric · Psychological Horror

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

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

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

No one lives under the lighthouse Director's cut
Shared: Indie · Horror · Atmospheric

Visage
Shared: Horror · Psychological Horror · Atmospheric

Little Nightmares
Shared: Horror · Atmospheric · Indie

Rental
Shared: Horror · Indie · Atmospheric

Still Wakes the Deep
Shared: Horror · Psychological Horror · Atmospheric

Garten of Banban
Shared: Horror · Psychological Horror · Singleplayer

Little Nightmares II
Shared: Horror · Singleplayer · Atmospheric

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

The Mortuary Assistant
Shared: Horror · Atmospheric · Singleplayer

Slender: The Arrival
Shared: Horror · Indie · Psychological Horror

Five Nights at Freddy's 2
Shared: Horror · Psychological Horror · Singleplayer

Phasmophobia
Shared: Horror · Psychological Horror · Supernatural