Project: Vaccine A

Project: Vaccine A

Birb Games · 2021 · Tower Defense, Free to Play, Base Building, Pixel Graphics, Singleplayer

PC
Very Positive88% · 52
This game is free to play. Get it on Steam →

Screenshots

About Project: Vaccine A


"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!

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.

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Feb 1, 2026
This needs more updates as this is so addicting and way too fun. Please add more towers and bosses
1 found this helpful
Recommended Jan 8, 2025
Here I will leave this cat, Friends who pass by can pet it and give it a thumbs up (i need steam points)       />  フ       |  _  _ l       /` ミ_xノ      /      |     /  ヽ   ノ     │  | | |  / ̄|   | | |  | ( ̄ヽ__ヽ_)__)  \二つ
1 found this helpful
Not recommended Oct 9, 2025
although i like the game, there's a few things stopping me from recommending it to everyone else: - the difficulty spike is vertical. after the bad design boss, the game has an awful spike in difficulty that makes it go from chaotically fun to completely unmanageable and unfun. [!] - response to developer feedback: the game seems too easy as the developer of the game because you made it, thus you know the best strategies and how to properly play your game. someone who is coming in as a player does not know the most optimal and/or best way to play, and thus might find the difficulty of the game frustrating. sometimes a different pair of eyes is what you need to realize what the issue is and how to properly solve it, which is the whole point of constructive feedback -- something i have been trying to give without shooting the game down. - the game crashes upon clicking the perk upgrade button after a run ends. no clue why this happens, but it just does. game is fine after reloading it, only after a run ends does it crash the game. [!] the game no longer does this to me, it only happened about 1 or 2 times. - way too limited amount of floor tiles and/or things to place down 99 may…
Recommended Aug 15, 2025
just cool like cant talk about cool
Recommended Jan 19, 2025
plot twist : you are defending your actual CPU against actual malwares there should be a gamemode where if you lose, you get your pc infected smh
Recommended Jul 26, 2024

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