How to Download Vaccine A

1. Click on the Vaccine A 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:

• OS: Windows 10
  
• Processor: Intel Core i5
  
• Memory: 100 MB RAM
  
• Graphics: Geforce RTX 3060
  
• Storage: 200 MB available space

No maximum requirements!!

Linux Requirements

No minimum requirements!!
No maximum requirements!!

Mac Requirements

Minimum:

• OS: macOS Big Sur
  
• Processor: Intel Core i5
  
• Memory: 100 MB RAM
  
• Graphics: Intel UHD Graphics 617
  
• Storage: 200 MB available space

No maximum requirements!!

Firewall, vaccine, cleaner... Place various blocks to protect your CPU! Vaccine A is a sandbox defense game, filled with parody of various programs.

"Protect your CPU!"
Build firewalls to protect your CPU, and build vaccines to keep malwares away!

Protect your base with 200+ blocks, skills and upgrades!
Restore your HP in Cleaner, Generate code files with Notepad, Watch full map with Web browser...
Interact with various characteristic blocks!
Noturn, A'vast... Upgrade various vaccines to protect your base.
Earn exp every game and apply 60+ new perks.

Meet familiar NPCs!
Clippy, Rocky, Installation wizard... meet your old friends.
Do you remember them?

BOSS BATTLE! yes. i said boss battle.
Boss battle every 6 waves!
Fire everything you got!

Background musics composed by AI!
Who said music is the field only for human?
Kneel before me. human.

Test new strategy with Creative mode!
Test various strategy and skills in Creative mode, where you can handle every settings!
Firewall spamming? Boss battle without vaccine tool? Or... make your own mini-game?


※Every programs and parodies appear in this game is made with pure respect, and no copyright issues intended.

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