Games like Postmortem: One Must Die (Extended Cut)
Games like Postmortem: One Must Die (Extended Cut) include Disco Elysium - The Final Cut, The Witcher 3: Wild Hunt — Remastered, Undertale, To the Moon, and OneShot. We matched them by the tags players give Postmortem: One Must Die (Extended Cut) on Steam (Adventure, RPG, Indie, Singleplayer, and Short): closest matches first, and among equally close ones the better-known games.

Disco Elysium - The Final Cut
Shared: RPG · Choices Matter · Story Rich

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Adventure · Singleplayer

Undertale
Shared: Choices Matter · RPG · Story Rich

To the Moon
Shared: Indie · Adventure · Story Rich

OneShot
Shared: Indie · Story Rich · Singleplayer

A Bird Story
Shared: Indie · Adventure · Short

Esoteric Ebb
Shared: RPG · Choices Matter · Story Rich

Florence
Shared: Adventure · Indie · Singleplayer

Soul Gambler
Shared: Adventure · Indie · RPG

Little Misfortune
Shared: Indie · Adventure · Choices Matter

Far Away
Shared: Singleplayer · Choices Matter · Story Rich

Ruined King: A League of Legends Story™
Shared: RPG · Adventure · Singleplayer

Baldur's Gate 3
Shared: RPG · Choices Matter · Adventure

Tales of the Black Forest
Shared: RPG · Adventure · Indie

The Wolf Among Us
Shared: Adventure · Story Rich · Choices Matter

Road to Empress I
Shared: RPG · Choices Matter · Adventure

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Point & Click

Gorogoa
Shared: Indie · Singleplayer · Adventure

The Witcher 2: Assassins of Kings Enhanced Edition
Shared: RPG · Singleplayer · Adventure

Finding Paradise
Shared: Adventure · RPG · Story Rich

Detroit: Become Human
Shared: Choices Matter · Singleplayer · Story Rich

Bastion
Shared: Indie · RPG · Singleplayer

The Life and Suffering of Sir Brante
Shared: RPG · Choices Matter · Story Rich

Firewatch
Shared: Adventure · Singleplayer · Story Rich