Who developed MOUSE: P.I. For Hire?

MOUSE: P.I. For Hire was developed by Fumi Games, an independent studio based in Warsaw, Poland. The team started with five people and grew to roughly 11–50 over the course of development.

Why was the game renamed from MOUSE to MOUSE: P.I. For Hire?

The rebrand was announced in August 2024. It clarified the game's identity as a noir detective story and addressed trademark considerations after Steamboat Willie entered the public domain.

What engine does MOUSE: P.I. For Hire use?

The game runs on Unity. It uses the engine to combine 3D level geometry with hand-drawn, frame-by-frame 2D character and effect animation.

How MOUSE: P.I. For Hire was made: from TikTok prototype to noir FPS

MOUSE: P.I. For Hire did not start as a big-budget pitch. It started as a five-person experiment at Fumi Games in Warsaw, and it reached a global audience because a short TikTok clip of its early prototype went viral in 2023.

This page traces the public development arc: from that initial moment through the rebrand, the hand-drawn production pipeline, PlaySide's involvement as publisher, and the multi-platform launch on April 16, 2026.

From a five-person team to a viral prototype

Fumi Games started with a team of five in Warsaw, Poland. The original vision was an art experiment: a first-person shooter rendered entirely in 1930s rubber-hose animation style.

In 2023, the project's lead programmer posted a short early-development clip on TikTok showing the protagonist firing a revolver inside the black-and-white cartoon world. The video went viral, drawing millions of views and shares. That response made Fumi Games realize their art demo had real commercial potential — not just a cool prototype, but the seed of a full game.

Brand evolution: from MOUSE to Mouse: P.I. For Hire

The game was originally titled simply MOUSE. As public attention grew, so did the creative ambition behind it.

In August 2024, the team officially rebranded to MOUSE: P.I. For Hire. The change was partly about trademark clarity — especially after Steamboat Willie entered the public domain — but more importantly it signaled a shift in direction. The game would be built around a noir detective narrative, not just a visual gimmick.

Lead producer Maciek Krzemień has said in multiple interviews that the team wanted the game to be more than eye candy. They wanted a deep, satirical noir story set in a corrupt city called Mouseburg — a place that looks cartoonish until it absolutely does not.

Hand-drawn frames and modern technology

The most distinctive production decision was the animation pipeline. Rather than using 3D models with cartoon shaders, Fumi Games committed to hand-drawn, frame-by-frame animation for every character and effect. The approach is closer to Cuphead than to a conventional FPS, and it is the single biggest reason the game's visual identity is immediately recognizable.

The game runs on Unity, which handles the integration of 3D environments with 2D hand-drawn assets. The soundtrack is original jazz composed by Patryk Scelina, performed by a big-band ensemble, with a guest track by Caravan Palace. Press coverage has consistently described the result as "Doom meets Cuphead."

Core development facts

Engine	Unity — fusing 3D environments with 2D hand-drawn assets
Art style	Rubber Hose Animation — hand-drawn, frame by frame
Music	Original jazz by Patryk Scelina; guest track "Good Mouse" by Caravan Palace
Press shorthand	"Doom meets Cuphead" — fast FPS combat with hand-drawn fidelity

Behind-the-scenes documentary

Official deep-dive documentary from PlaySide Studios and Fumi Games.

PlaySide Studios and the road to release

As the project scaled, Fumi Games grew from five people to a team of roughly 11 to 50. They partnered with PlaySide, Australia's largest listed game studio, for publishing support and cross-platform distribution.

The game launched on April 16, 2026 across PC (Steam), PlayStation 5, Xbox Series X|S, and Nintendo Switch 2 at a standard price of $29.99. The launch-day reception confirmed that the journey from a rough TikTok clip to a full multi-platform release was complete.

Sources

Story & Characters The narrative setup and Mouseburg cast that the rebranding was designed to support.
Official Media Trailers, the documentary, and the soundtrack feature referenced in the production story.
Review Roundup How critics assessed the finished product after launch.

The Making of MOUSE: P.I. For Hire