Games like Morbid
Games like Morbid include Who's Lila?, The Outlast Trials, Phasmophobia, Zort, and Lethal Company. We matched them by the tags players give Morbid on Steam (Psychological Horror, Choose Your Own Adventure, Immersive Sim, Mystery Dungeon, and Interactive Fiction): closest matches first, and among equally close ones the better-known games.

Who's Lila?
Shared: Psychological Horror · Choose Your Own Adventure · Interactive Fiction

The Outlast Trials
Shared: Psychological Horror · PvE · Horror

Phasmophobia
Shared: Psychological Horror · Horror · First-Person

Zort
Shared: Psychological Horror · PvE · Horror

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

Saiko no sutoka
Shared: Psychological Horror · Choose Your Own Adventure · First-Person

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

The Exit 8
Shared: Psychological Horror · Immersive Sim · Horror

The Cabin Factory
Shared: Psychological Horror · Immersive Sim · Horror

Kiosk
Shared: Psychological Horror · Immersive Sim · Action-Adventure

Breakout 13
Shared: Choose Your Own Adventure · Interactive Fiction · Immersive Sim

Slay the Princess — The Pristine Cut
Shared: Psychological Horror · Choose Your Own Adventure · Interactive Fiction

MiSide
Shared: Psychological Horror · First-Person · 3D

PILGRIM
Shared: PvE · Action-Adventure · Psychological Horror

Gorilla Tag
Shared: Psychological Horror · First-Person · 3D

The Test: Final Revelation
Shared: Choose Your Own Adventure · Psychological Horror · Immersive Sim

Ghost Exile
Shared: Psychological Horror · Perma Death · Horror

Cruelty Squad
Shared: Immersive Sim · Psychological Horror · Surreal

Backrooms: Escape Together
Shared: Psychological Horror · Horror · First-Person

Dagon: by H. P. Lovecraft
Shared: Psychological Horror · Choose Your Own Adventure · Horror

Demonologist
Shared: Psychological Horror · Horror · First-Person

SILENT HILL: Townfall
Shared: Psychological Horror · Horror · First-Person

Amnesia: The Bunker
Shared: Immersive Sim · Psychological Horror · Horror

Hamster Hunter
Shared: Psychological Horror · Action-Adventure · 3D