MORTALITY DECOMP. KILLERS

Third-person horror-comedy shooter about an undead detective hunting his killers

CUPPAKILL · Released Apr 25, 2025

Reviews: Very Positive; 81% of 115
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Untested
Last update on Steam: 1 month ago; Sep 2, 2026
Minimum PC: 9800GT; 2 GB RAM · 1 GB disk; Full requirements

What is MORTALITY DECOMP. KILLERS?

A short, single-player third-person shooter with hand-drawn visuals inspired by retro detective comics. As Clive, an undead detective trying to stop his killers from weaponizing immortality, you shoot and slash through semi-linear corridor levels, refining your route for faster clears.

For you if...

+you enjoy difficult action built around repeated attempts

Not for you if...

−you want open exploration rather than corridor levels
−you prefer a long game with relaxed combat

What players say

81% of 115 reviews are positive

Players praise the art style and soundtrack. Common complaints include automatic camera switching that disrupts aiming, shots missing where players aim, and enemies shooting through walls.

Screenshots and trailer

MORTALITY DECOMP. KILLERS system requirements

Minimum: 9800GT, 2 GB RAM, 1 GB of disk space.

As published by the developer.

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Minimum

OS: Windows 10 or 11
Processor: Intel i5 2nd gen or Equivalent
Graphics: GeForce 9800GT Or Equivalent
Memory: 2 GB RAM
Storage: 1 GB available space
Notes: Take these requirements with a large pinch of salt.

Does MORTALITY DECOMP. KILLERS have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does MORTALITY DECOMP. KILLERS run on Steam Deck?

Untested Not yet tested by Valve on Steam Deck.

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows
Achievements: 38
Steam features: Family Sharing
Languages: Text only: English.

Does MORTALITY DECOMP. KILLERS use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam