Games like The Madness
Games like The Madness include Ready or Not, VLADiK BRUTAL, Liars Bar, Fresh Start Cleaning Simulator, and Half-Life. We matched them by the tags players give The Madness on Steam (Casual, FPS, 3D, First-Person, and Realistic): closest matches first, and among equally close ones the better-known games.

Ready or Not
Shared: FPS · Realistic · First-Person

VLADiK BRUTAL
Shared: FPS · First-Person · Casual

Liars Bar
Shared: Casual · FPS · 3D

Fresh Start Cleaning Simulator
Shared: 3D · First-Person · Realistic

Half-Life
Shared: FPS · 1990's · First-Person

Resident Evil Requiem
Shared: FPS · First-Person · Cinematic

The Room
Shared: Mystery · Atmospheric · Casual

Boxes: Lost Fragments
Shared: Casual · 3D · Mystery

Call of Duty®
Shared: FPS · First-Person · Singleplayer

Garry's Mod
Shared: Casual · First-Person · FPS

Return of the Obra Dinn
Shared: Mystery · Atmospheric · First-Person

The Death | Thần Trùng
Shared: Casual · Realistic · First-Person

Riven
Shared: First-Person · 3D · Atmospheric

Black Mesa
Shared: FPS · First-Person · Atmospheric

Insurgency: Sandstorm
Shared: FPS · Realistic · First-Person

Subliminal
Shared: Realistic · First-Person · Atmospheric

Firewatch
Shared: First-Person · Atmospheric · Mystery

Moncage
Shared: Casual · Indie · Atmospheric

Squad
Shared: FPS · Realistic · First-Person

Amanda the Adventurer
Shared: First-Person · 1990's · Mystery

Car Dealership Simulator 2
Shared: Casual · FPS · First-Person

Half-Life: Opposing Force
Shared: FPS · First-Person · 1990's

Insurgency
Shared: FPS · Realistic · First-Person

Garten of Banban
Shared: First-Person · 3D · Singleplayer