Games like Morphine
Games like Morphine include Ready or Not, Blood and Bacon, Lethal Company, Escape the Backrooms, and Zort. We matched them by the tags players give Morphine on Steam (Indie, Adventure, Horror, Psychological Horror, and Cinematic): closest matches first, and among equally close ones the better-known games.

Ready or Not
Shared: Horror · FPS · Psychological Horror

Blood and Bacon
Shared: Funny · Horror · Indie

Lethal Company
Shared: Horror · Psychological Horror · First-Person

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure

Zort
Shared: Horror · Psychological Horror · Funny

The Stanley Parable
Shared: Indie · Comedy · Adventure

Content Warning
Shared: Horror · Comedy · Indie

Outlast
Shared: Horror · Psychological Horror · First-Person

The Beast Inside
Shared: Adventure · Horror · Indie

ParanormalHK
Shared: Horror · Psychological Horror · Adventure

Buckshot Roulette
Shared: Horror · Indie · First-Person

Blair Witch
Shared: Adventure · Horror · Indie

Dark Deception
Shared: Horror · Psychological Horror · Indie

Inside the Backrooms
Shared: Horror · Psychological Horror · Adventure

Serious Sam II
Shared: Comedy · FPS · Action

Spooky's Jump Scare Mansion: HD Renovation
Shared: Indie · Horror · Adventure

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Horror · Indie

Borderlands 2
Shared: Action · Shooter · Funny

How to Fish
Shared: Indie · Adventure · First-Person

PEAK
Shared: Adventure · Comedy · First-Person

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

[Chillas Art] The Convenience Store
Shared: Indie · Horror · Adventure

R.E.P.O.
Shared: Horror · Comedy · First-Person

Phasmophobia
Shared: Horror · Psychological Horror · First-Person