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MOUSE: P.I. For Hire

MOUSE: P.I. For Hire cover art
Developer
Fumi Games
Publisher
PlaySide
Released
Apr 16, 2026
Steam reviews
94% of players recommend it, from 15,952 reviews — Steam calls that “Very Positive”
Tags
ActionIndie
View on Steam

On Linux, Steam Deck and Steam Machine

Proton: PlatinumDeck VerifiedSteam Machine: VerifiedSteamOS Compatible

This game runs perfectly out of the box under Proton, per ProtonDB reports (94 reports). Valve rates it Deck Verified.

Valve rates it Verified on Steam Machine. Valve marks it SteamOS Compatible.

Proton tier: ProtonDB · Deck rating: Valve · Steam Machine, Steam Frame and SteamOS ratings: Valve · Compare 2,053 games · Every game Valve rated for Steam Machine

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About this game

The developer's description, from the game's Steam store page.

MOUSE: P.I. For Hire is an action-packed first-person shooter that draws inspiration from the classic cartoons of the 1930s. Its black and white rubber hose visuals are drawn by hand, frame by frame, delivering a striking vintage aesthetic. Unravel layers of corruption with a thrilling noir-fueled detective story, lively environments to explore, an original big band jazz soundtrack, and a fully-loaded arsenal of cartoon weapons and devastating power-ups.

Meet Private Investigator Jack Pepper, a former war hero-turned-detective in a world where danger lurks even in the smallest mouse hole. Uncover the truth when a simple missing persons case quickly escalates into a complex web of intrigue, with corruption, kidnapping and murder all on the docket. Investigate the seedy underbelly of Mouseburg, battle heavily armed gangs and crooked cops, and discover clues to reveal the conspiracy buried underneath the surface.

From crackling machine guns to explosive firepower, each weapon in Pepper’s arsenal is designed to deploy non-stop cartoon chaos. Arm yourself with an array of classic, creatively twisted and experimental firearms, and consume powerful upgrades when you need that extra spinach-loaded punch! Lethal encounters and manic boss battles await in this boomer shooter-inspired, retro-vibed adventure - and the denizens of Mouseburg never go down without a fight.

Explore a diverse city playground, from dark streets to classic film studios, opulent opera buildings, poisonous swamps and underground sewers. With a myriad of cases to solve and collectibles to find, Mouseburg is truly a detective’s delight! Use every tool at your disposal to wall-run, grapple-hook and double-jump through this unrelenting cartoon world.

  • Black and white, hand-drawn rubber hose animation, inspired by cartoons of the 1930s
  • Fast-paced FPS combat, where constant movement is key
  • A thrilling single-player campaign that unravels a complex web of crime and corruption
  • Over 20 noir-infused levels, teeming with mice, rats and shrews
  • Fully-loaded arsenal of over ten unique weapons and equipment - with a cartoon twist
  • Devastating consumable power-ups, capable of turning the tide of any battle
  • Unlockable movement abilities and Metroidvania-inspired level traversal
  • Original jazz soundtrack, featuring a big band orchestral ensemble

System requirements

As Steam lists them.

Windows

Minimum

Requires a 64-bit processor and operating system
OS
Windows 10 64-bit
Processor
Intel Core i3 8300 / Ryzen 3 2200
Memory
12 GB RAM
Graphics
GeForce GTX 960 / Intel Xe 2 Graphics / Radeon RX 580
DirectX
Version 11
Storage
11 GB available space
Additional Notes
VRAM: 6 GB

Recommended

Requires a 64-bit processor and operating system
OS
Windows 11
Processor
Intel Core i5 9600 / Ryzen 3600
Memory
16 GB RAM
Graphics
GeForce RTX 3060 / Intel Arc B570 / Radeon RX 7600
DirectX
Version 11
Storage
11 GB available space
Additional Notes
VRAM: 8 GB

Downloadable content

Steam lists 3 items of downloadable content for this game.

News

What MOUSE: P.I. For Hire's studio and the outlets Valve syndicates on Steam have said recently.

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