Postmouse

Third-person puzzle platformer about a mouse delivering letters

Critters Collective · Published by The Animation Workshop · Released Jan 30, 2023

Reviews: Very Positive; 90% of 1,737
Recent reviews: Very Positive; 92% of 13 in 30 days
Players: 8; daily peak, Nov 7, 2026
Steam Deck: Unsupported
Last update on Steam: 3 years ago; Jan 17, 2023
Minimum PC: GeForce GTX 970; 4 GB RAM · 10 GB disk; Full requirements

What is Postmouse?

A timid mouse sets out to deliver letters in this linear, single-player puzzle platformer set among overgrown ruins inside an abandoned mansion. From a third-person view, you cross hazards, solve environmental puzzles, talk to other animals, and collect stamps that unlock concept art and backstory.

For you if...

+you enjoy brief adventures with animal characters
+you like exploring ruins and solving environmental puzzles

Not for you if...

−you want a long, open-ended adventure
−you dislike platforming or sudden chase sequences

What players say

90% of 1,737 reviews are positive · 92% of 13 in the last 30 days

Players praise the detailed environments, animal characters, and gentle story. Common complaints include slippery movement, collision glitches that can leave players stuck, and a frustrating chase sequence.

Screenshots and trailer

Postmouse system requirements

Minimum: GeForce GTX 970, 4 GB RAM, 10 GB of disk space.

As published by the developer.

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Minimum

OS: Windown 10
Processor: Dual Core with Hyper-Threading
Graphics: Nvidia GeForce GTX 970 / AMD RX 480
Memory: 4 GB RAM
Storage: 10 GB available space

Does Postmouse have co-op or multiplayer?

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

Single-player

Does Postmouse run on Steam Deck?

Unsupported No: Valve rates it Unsupported on Steam Deck.

Not supported on SteamOS

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows
Steam features: Family Sharing
Languages: Full audio: English.

Does Postmouse 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 25, 2026. How to filter AI games on Steam