Rat Overflow for Pc & Linux - Free Download (2026)

Rat Overflow Screenshots

How to Install Rat Overflow on Windows Pc

Click on the Rat Overflow download button below.
Choose "Install" to install the game on the windows steam client.
Follow the on-screen prompts
Let it download the Full Version.
Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

Guide: Installing Rat Overflow on Linux with Steam Proton

This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.

1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."

Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.

Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.

2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.

3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.

4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.

System Requirements

Windows Pc Requirements

Minimum:

OS: Windows 10
Processor: Any dual-core processor
Memory: 4 GB RAM
Graphics: Integrated graphics
Storage: 500 MB available space

Recommended:

OS: Windows 10
Processor: Any dual-core processor
Memory: 8 GB RAM
Graphics: Integrated graphics
Storage: 500 MB available space

Linux Requirements

No minimum requirements!!
No maximum requirements!!

Mac Requirements

No minimum requirements!!
No maximum requirements!!

What is Rat Overflow? Features and Description

Rat Overflow is an adorable rat breeding simulator about genetics, glory, and having way too many rats. Develop your show winner bloodlines and breed thousands of unique rat coats!

Rat Overflow is a deceptively cute rat breeding simulator about genetics, glory, and having way too many rats.

Breed fancy rats with a realistic color genetics system, show them off in competitions, and try to keep track of your ever-growing colony. Pick your pairings carefully — or don't — and watch the pups grow into champions, beloved pets, or delightful genetic surprises. With thousands of possible rat appearances driven by real inheritance mechanics.

Start with humble stock, outcross from five quirky NPC breeders — each with their own color specialties and personalities — and build bloodlines that dominate the show circuit. But be warned: Rats breed fast. More pups are on the way. They're always on the way.

SHOW THEM OFF

Enter your best rats in shows against rival breeders, win championships, and level up to unlock new breeders with new color varieties and better genetics.

REAL GENETICS, REAL CONSEQUENCES

Over a dozen genetic loci control color, markings, health, and conformation. Siamese, Russian Blue, Dumbo ears, Rex coats — it's all in the genes. Breed strategically, or discover what happens when you don't.