Games like The Slaughter: Magdalene
Games like The Slaughter: Magdalene include L.A. Noire, The Case of the Golden Idol, No Case Should Remain Unsolved, There Is No Game: Wrong Dimension, and The Mermaid Mask. We matched them by the tags players give The Slaughter: Magdalene on Steam (Adventure, Point & Click, Interactive Fiction, Noir, and Detective): closest matches first, and among equally close ones the better-known games.

L.A. Noire
Shared: Adventure · Detective · Noir

The Case of the Golden Idol
Shared: Detective · Point & Click · Interactive Fiction

No Case Should Remain Unsolved
Shared: Interactive Fiction · Point & Click · Adventure

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

The Mermaid Mask
Shared: Adventure · Point & Click · Detective

The Rewinder
Shared: Adventure · Pixel Graphics · Detective

Sherlock Holmes: The Devil's Daughter
Shared: Adventure · Detective · Crime

The Wolf Among Us
Shared: Adventure · Detective · Point & Click

Tangle Tower
Shared: Point & Click · Detective · 2D

Tails Noir
Shared: Adventure · Detective · Pixel Graphics

Detective Di: The Silk Rose Murders
Shared: Point & Click · Interactive Fiction · Detective

Sherlock Holmes: Crimes and Punishments
Shared: Adventure · Detective · Point & Click

Unavowed
Shared: Adventure · Point & Click · Pixel Graphics

Chicken Police - Paint it RED!
Shared: Adventure · Noir · Detective

Finding Paradise
Shared: Adventure · Pixel Graphics · 2D

Murdered: Soul Suspect
Shared: Adventure · Detective · Atmospheric

Lacuna A Sci-Fi Noir Adventure
Shared: Interactive Fiction · Noir · Detective

Disco Elysium - The Final Cut
Shared: Detective · Point & Click · Noir

To the Moon
Shared: Adventure · Interactive Fiction · Pixel Graphics

Gemini Rue
Shared: Adventure · Point & Click · Noir

The Darkside Detective
Shared: Point & Click · Adventure · Detective

The Darkside Detective: A Fumble in the Dark
Shared: Point & Click · Detective · Pixel Graphics

NORCO
Shared: Point & Click · Noir · Pixel Graphics

Kathy Rain 2: Soothsayer
Shared: Point & Click · Detective · 2D