Games like The Dark Quarter
Games like The Dark Quarter include Murdered: Soul Suspect, Vampire: The Masquerade - Bloodlines, Sanfu, PARANORMASIGHT: The Mermaid's Curse, and The Witcher 3: Wild Hunt — Remastered. We matched them by the tags players give The Dark Quarter on Steam (RPG, Board Game, Choose Your Own Adventure, 1980s, and Supernatural): closest matches first, and among equally close ones the better-known games.

Murdered: Soul Suspect
Shared: Supernatural · Mystery · Atmospheric

Vampire: The Masquerade - Bloodlines
Shared: RPG · Supernatural · Vampires

Sanfu
Shared: RPG · Mystery · Adventure

PARANORMASIGHT: The Mermaid's Curse
Shared: RPG · Mystery · Supernatural

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

The Life and Suffering of Sir Brante
Shared: RPG · Choose Your Own Adventure · Interactive Fiction

The Deed
Shared: RPG · Crime · Atmospheric

Roadwarden
Shared: RPG · Choose Your Own Adventure · Interactive Fiction

PARANORMASIGHT: The Seven Mysteries of Honjo
Shared: Supernatural · 1980s · Mystery

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

Paper Bride 2 Zangling Village
Shared: RPG · Mystery · Supernatural

Unheard - Voices of Crime
Shared: Mystery · Crime · RPG

Firework
Shared: Mystery · Atmospheric · Supernatural

The Test
Shared: Choose Your Own Adventure · RPG · Mystery

Suzerain
Shared: Choose Your Own Adventure · RPG · Interactive Fiction

L.A. Noire
Shared: Crime · Mystery · Noir

Disco Elysium - The Final Cut
Shared: RPG · Atmospheric · Noir

Vampyr
Shared: RPG · Vampires · Atmospheric

OXENFREE II: Lost Signals
Shared: Supernatural · Mystery · Choose Your Own Adventure

The Wolf Among Us
Shared: Choose Your Own Adventure · Adventure · Visual Novel

The Mermaid Mask
Shared: Supernatural · Mystery · Interactive Fiction

Vampire: The Masquerade — Night Road
Shared: Choose Your Own Adventure · RPG · Vampires

The Blood of Dawnwalker
Shared: RPG · Vampires · Adventure

The Life and Suffering of Sir Brante — Chapter 1&2
Shared: Choose Your Own Adventure · RPG · Interactive Fiction