
Firewall, vaccine, cleaner... Place various blocks to protect your CPU! Vaccine A is a sandbox defense game, filled with parody of various programs.
Revenue comes from in-game items and microtransactions, which our price-based model doesn't estimate. Copies below reflect the player base, not paid sales.
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About

"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.
Genres
Stats
Languages: English, Korean, Russian, Japanese, Simplified Chinese
Engagement
Reviews
Themes across 40 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
just cool like cant talk about cool
divertido: juéguenlo
наман вроде
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Trends
Concurrent players on Steam, sampled daily since tracking started.
Hours played at review time, across 40 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
es un excelente juego
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 seem like a lot for those floor tiles, but it really isn't - no way to refund perk upgrades say you wanted something but accidentally chose to upgrade something else. how do you go about that now? turning it off doesn't give you your perk point back sadly. - and the limited time rewards. limited time rewards are, in my opinion, egregious. really brings the game down by several notches -- especially if there's a large amount of them. my only solutions would be to make the game scale in difficulty way slower, or to add difficulty settings. the perk upgrade crashing is annoying, but it's not really that much of an issue other than that. to just increase the amount of floor tiles you get, or to make a way to increase the amount of floor tiles you get. and, i'm not sure if this last one would be able to be fixed in a non-gamebreaking way, either code-wise or game-wise itself, but simply allowing you to refund your upgrades would be good for me and also removing most of the limited-time-only rewards, or adding alternative ways to get them. (the alpha and bugtester ones are the only ones i would exclude from this honestly) those are absolutely a no-go. i forgot the names of things halfway through making this review, and would be happy to change my recommendation to a "yes" if at least the difficulty issue is addressed in some way or another. it's the only thing holding me back, really [!] lastly, i think it would be super cool to play as vaccine N in normal / survival play. that's just my opinion though. might be too strong, might be too weak. maybe a toned-down and/or adjusted version of N would do perfectly here. thank you for at least responding to this feedback. the crash no longer seems to happen, so i'm not sure what happened there -- but at least i know that this developer actually really cares about this project. i can't wait to see it improve! cheers.
👍
해적선이 떠난 상태에서 밀짚모자를 잡으면 게임이 크래시나네요
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
★★★☆☆
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.