How to Download Boo! - The Mystery Story

1. Click on the Boo! - The Mystery Story download button below.
2. Choose "Install" to install the game on the windows steam client.
3. Follow the on-screen prompts
4. Let it download the Full Version.
5. Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

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.

Windows Pc Requirements

Minimum:

• Requires a 64-bit processor and operating system
  
• OS *: Win 7
  
• Processor: Quad-core Intel / AMD processor, 2 GHz
  
• Memory: 4 GB RAM
  
• Graphics: 1 GB
  
• DirectX: Version 10
  
• Storage: 400 MB available space

Recommended:

• Requires a 64-bit processor and operating system

Linux Requirements

Minimum:

Recommended:

Mac Requirements

Minimum:

• OS: Big Sur 11 or newer
  
• Processor: Intel Core i3
  
• Memory: 4 GB RAM
  
• Graphics: Metal capable Intel and AMD GPUs
  
• Storage: 8 GB available space

Recommended:

• OS: Big Sur 11 or newer
  
• Processor: Intel Core i5, Apple M1
  
• Memory: 8 GB RAM
  
• Graphics: Metal capable Intel and AMD GPUs, Apple M1
  
• Storage: 8 GB available space

Boo! is a 2.5D cartoon-style platformer with shoot 'em up action and hardcore combat. Explore a plant-infested world, collect blaster modules, battle unique bosses, and uncover the city's secrets in a world inspired by vintage animation and hidden dangers.

       

Boo! is a 2.5D side-scrolling shoot 'em up platformer set in a vibrant cartoon world… that’s slowly being devoured by a green apocalypse.

This is a dark and mysterious tale about a city under siege by monstrous plants. No one knows where they came from, or why they’re attacking. But when Matt’s best friend Emma is taken during the chaos, his search for her will uncover something far worse than overgrown vines.

You are Matt, a tired plumber caught in the middle of the green apocalypse. Armed with a stolen blaster and his trusty plumber’s plunger, Matt must battle through hordes of mutated plant creatures, survive deadly boss encounters, and uncover the truth behind the outbreak. Along the way, a shadowy figure offers strange upgrades — blaster modules that the player assembles and customizes to match their combat style.

Every encounter brings you closer to a horrifying realization: the plants didn’t rise by accident. Someone is behind it all… and he’s watching you.

Shoot 'em up with deck-building

Your blaster is modular — each component alters its behaviour, from damage type to shot pattern. Combine modules to match your style and adapt to every enemy.

Explore a living, infected world

An open, interwoven world invites deep exploration. Unlock new abilities and return to previously unreachable areas.

Unique Bosses & Enemies

Every boss and enemy is a challenge, with complex mechanics and memorable designs. Expect frustration — and satisfaction — when you finally win.

Hand-drawn cartoon style

Inspired by 1930s–1950s animation: fluid movement, expressive characters, and nostalgic charm hiding real danger.

Features

• 2.5D platforming with intense shoot 'em up combat

• Dozens of unique enemies and tough bosses

• Vintage cartoon visuals with a dark twist

• No mercy. No shortcuts. Just roots, bullets, and skill

Add to your wishlist if you love cartoon art and hardcore challenge!

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