
Get injected into the microscopic world of BioGun. Face viral threats and winding corridors on your mission to save man’s best friend from the inside. Will you save dog-kind from extinction?
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0/day in the week to Aug 3 → 0.86/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 26 chart moves that followed a price cut of more than 20% went a median of 7 places towards #1, and the 2,400 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
Join Bek on his journey to save the entire canine species from an extinction caused by the sinister Dooper Virus. Inject yourself into a zany hand-drawn world of germs, cells, and winding passages full of vibrant characters and ferocious bosses with a story that takes place inside our beloved pets.
Give your dog a fighting chance by aiding its immune system to fight off the Dooper Virus. Befriend cells on your journey, absorb new powers from vanquished foes and explore vital organs to prevent them from failing! Will you be the vaccine to save dog-kind from extinction?

Fast paced side-scrolling 360 shooter action with all the modern gameplay mechanics you’ve come to expect and more.
Blast your enemies with an impressive array of weapons. Augment your DNA and modify your playstyle using Nano-Chips. Take on bosses inspired by real diseases in uniquely designed encounters.
Complete side missions to aid Cells in need. Explore each organ to earn rewards and learn about the life forms that live there.
Traverse a hand-drawn microscopic world full of traditionally animated cells, germs, viruses and bacteria. Meet the wondrous creatures, both friendly and hostile, that inhabit it. Discover the many secrets cleverly hidden in your dog's body.
You will be accompanied on your mission by a blood-pumping score by Juhani Junkala
Save humanity's best friend. Prove that you’re the vaccine that can put an end to the pet-demic. What are you waiting for? Put on your hazard suit and blast some viral scum! The fate of dog-kind is in your hands!

Add-ons
Each DLC is estimated with the same model as a game, then summed — a modeled figure, not reported DLC sales.
Engagement
Reviews
Themes across 60 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
Biogun is a Metroidvania about deworming puppies. Beat it and collected all the stuff (did not 100% achievements, though) in 19 hours using a game controller. Difficulty is medium. I got this as part of a humble bundle. Trigger Warning for: needles. Gameplay - You blast your way through enemies, beat bosses, collect upgrades, and find new guns. It's pretty Metroid in terms of Metroidvania. Controls - Takes a little getting use to. R shoulder buttons shoot. L Joystick moves. The rest of the buttons are used for stuff. Once you get use to it, it becomes easier. The worst part was having to aim the gun with R Joystick, which definitely made earlier game hard for me. Story - Sad doggo, helpful piggo, bad bugs. There. That's the entire story. Music - Pretty standard for metroid-like games. Nothing wormed its way into my head forevermore. Characters - MC is likeable. Lots of colorful, cute npcs. 3/4ths of the bosses, of which there are many, are a little forgettable. The monsters you fight are mid on variance (there are a lot of monsters, but some have slightly swapped color schemes.) Levels - Had a really hard time remembering where to go and where certain quest characters were. While the color scheme and 'texture' designs of the areas are different, all the areas felt the same to me with few exceptions. Which is weird, since the map goes out of its way to tell you where each section. Maybe it's because the train doesn't go to 'liver' or 'spleen', it goes to 'XTown, and Bloodville' but then doesn't list those on the map. The monsters being spread out any which way with less variance on where they end up (with some exceptions) didn't help. And the quest end-points not being marked didn't help. Collectables - Tons. There are hats. Achievements - You'll need to play the game more than once to get all the achievements. Some achievements will be hard to get, or are obscure and missable. ** Light sensitivity/epilepsy warning - Some of the game is in the dark with bright flashing lasers. If you have epilepsy, I wouldn't. If you have light sensitivity, play during the day in a well-lit room and take a break if you start to get a headache. If you like Metroidvanias, BioGun is a really good game and does its job. It's better than most of the metroidvania bin out there. There's a lot to shoot at, fun characters, and tons of collect. The entire game is pretty straightforward and wont leave you trying to grasp at what the plot was. The music in the game is good while playing. And it's a good game to sink time into. That said, there's a little too much to take in when it comes to controls - I still don't quite grasp what the various chips/bits/glorbs/etcetcetc mean because it's not written down in the menu pointing out what means what. It also took me a while to figure out secondary guns, why you can only shoot so much, and how to refill on the fly, for the same reason. Aiming to shoot is a straight up pain. And while the map lists a ton, there's no easy way to find where you're supposed to complete quests (looking at Boku and the blood quest). More than once I had to look on reddit and wiki for answers because steam lacks enough straight-forward guides. This game ended up in my game closet because the title and art didn't pull me enough, and required a steam roulette to find. But I'm still glad I picked it up and played. :D Once you get use to things, the world sweeps you up and takes your bacon butt for a ride. Lastly, [spoiler] the very end needs happy dog pics. [/spoiler]
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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English*, French, German, Russian, Spanish - Latin America*languages with full audio support
Hours played at review time, across 60 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
[h1]Overview:[/h1] '[i]BioGun[/i]' is a 2D side scrolling platform shooter where you play as a microscopic pig named "Bek" on a mission to save a man's best friend from a virus set out to end all of dog-kind. With some pretty serious stakes on the line, the plot revolves around a virus called the "Dooper Virus" having swept across the world. Currently only affecting canines, it runs the risk of evolving and affecting more species if left incurable. A doctor by the name of "DocX" created Bek as an antigen to traverse through his dog's body to combat the virus and hopefully become an antibody in the process and develop a vaccine to distribute to the world. With that in mind, it's not hard to say that the entire game does in fact take place inside a dog's body with maps ranging from the lungs, liver, heart and yes, even the colon. '[i]BioGun[/i]' offers a unique premise and concept when it comes to it's story and executes it in a pretty interesting way (and rather well if I have to say so myself). [h1]Gameplay:[/h1] '[i]BioGun[/i]' presents itself as a '[i]Metroidvania[/i]' kind of game in the sense that it blends the elements from both the '[i]Metroid[/i]' and '[i]Castlevania[/i]' games although personally, I feel it leans way closer to being to a '[i]Metroid[/i]' game than a '[i]Castlevania[/i]' game with it's theme, combat and movement. That isn't coherently a bad thing because it does almost every single element it guns for really well. For starters, the combat is fun and well done from the start to the very end. The game is a shooter first and foremost. You [i]do[/i] get a melee attack way later in the game but it's use is extremely limited and only really used to progress the game in one particular area. The game gives the player a basic blaster to start with but many others get unlocked as the game progresses. I find that in a lot of games, there's usually a meta when it comes to what weapon to use but I actually found myself utilizing most of the weapons I unlocked which was refreshing. The number of enemies is also plentiful and many behave uniquely and pose different threats to the player with some requiring disposal in a variety of different ways. There are also power-ups in the form of capsules that the game has that gives different buffs and benefits but this is the one feature I didn't find myself using that much simply cause I was too busy shooting. They [i]can[/i] be helpful but I was able to beat the game pretty easily without using any of them. That being said, it's still good to know that there are capsules that can help a player that's having trouble in a specific area. Now although I personally didn't find the game extremely hard, it definitely isn't a walk in the park either. There are some boss battles and sections that are way harder than usual and feel like unexpected difficulty curves. With any hard part in a game, it just takes a bit of practice and trial and error to learn and overcome it but I can definitely sympathize with the players complaining about random difficulty spikes because they are indeed in this game and I too have felt it. Because the game isn't linear, you can be breezing through an area then suddently come across a boss or platforming section that will constantly kick your ass. It's a drawback of having a non-linear game but the best solution is to just come back when you're stronger, or simply learn and develop one. Lastly, the movement is for the most part fluent. responsive and fun to execute. Something about being able to dash infinitely without a cooldown is just overly satisfying to me. You unlock more movement options as the game progresses including double jumping, ground pounding and hovering. The game implements every single type of movement on top of the unique weapons found throughout the game into the puzzles the player will eventually end up discovering. Many areas will be discovered early on and be inaccessible, requiring the player to backtrack once they've unlocked the proper gear needed. This is where the '[i]Metroid[/i]' element shines the most. Backtracking is a normal mechanic in the game and can be somewhat confusing at first. Thankfully, there are [b]nervous systems[/b] in each organ that can reveal the entire map including landmarks that makes backtracking way easier. '[i]BioGun[/i]' is extremely fun and definitely worth trying for players who are into this type of game. I did have a few gripes with the game however. There were some instances where I clipped through walls or glitched requiring a restart as well as some movement mechanics being very janky or not responding consistently. There some areas where I kept stopping as if I was running into an invisible wall just to find out it was 2 platforms lined up side by side but one was just 1 pixel higher than the other. Some even caused me to fall through the floor which isn't fun. My main pet peeve was the fact that sometimes when opening the menu to change weapons, check the map or just do something in the UI, closing it would cause it to reappear. This made it especially frustrating during boss battles when I need to open it for a quick second to swap weapons just to have it open back up when trying to close. [h1]Controls:[/h1] As mentioned, responsive for the most part and easy to learn. The game also explains how to use certain abilities as they come which is always welcome. Rebinding keys is possible which is another nice touch and something I know many people like to have in a game like this. [h1]Graphics:[/h1] Despite being a rather gross and uncomfortable setting to some, the graphics I actually find visually appealing. Sure, it's the insides of a dog but the developers somehow managed to make such a taboo and weird setting bright and vibrant. You dash and jump your way through intestines and guts but even with that context, the game is still nice to look at. Shading, lighting and visual effects when it comes to combat and animations are superb. At no point in the game did I find it repetitive. [h1]Audio:[/h1] Nothing special but nice to the ears. The way characters talk was pretty amusing and unique to each one. Music isn't bad but is forgettable. Sound effects are good and volume settings are thankfully metered. [h1]Conclusion/TL;DR:[/h1] '[i]BioGun[/i]' is an above average 2D side scrolling platform shooter where you play the role as a microscopic antigen in the form of a pig on a mission to save a virus-riddened dog. It offers plenty of gameplay (At around 20 hours for 100%) with lots of areas to explore, weapons to shoot and abiltiies to use. There are a few problems from a couple janky movement mechanics to odd difficulty curves, but with decent graphics (given the setting), amazing gunplay, and a great exploration element, the fun '[i]BioGun[/i]' gives the player far surpasses it's flaws.
I didn’t expect Biogun to be this good. It’s more a metroid than a vania and it does almost everything right. + Nails the metroidvania mechanics. Most of the traversal tools are original and feel good to play with + The level design is smart and rewarding to explore and it’s one of the least linear metroidvania I’ve played. + Lots of secrets to find + Works like a twin stick shooter and boss and enemies are fun to fight with + Graphism and performance are good which surprised me since they use some weird game engine linked to your browser. - The game is way way too easy. There is a challenge with playing only with a broken gun and I guess it must be tough but the base game poses zero challenge. I killed maybe 90% of the bosses on my 1st try - It’s not necessarily an issue but you can cheat the game in so many ways it’s weird. There are tricks to jump where you shouldn’t be able to, teleport straight to the end of an area at death, skipping the entire challenge, ect… - No 4k Rating: A strong 7/10 Game is on the lower end of a medium size MV. Expect 20 hours.
Overall, it's an alright metroidvania. Web-based engine, so expect frame-drops etc if you have second-monitor content. Note for completionists: I wouldn't recommend this game, as all achievements requires not using multiple game mechanics and playing on 1 hp the whole game. The Addict achievement was also super finnicky.
Fantastic Metroidvania with excellent sound and graphics. Controls took some getting used to (Twin-Stick fighting while moving) and there were some noticeable softlock issues. But overall this was a very well-rounded and exciting experience with lots of humor. This game wears its inspiration front and center, while still innovating with some quite well-designed traversal and weaponry options. Difficulty is overall quite manageable, as you get plenty of options to make it as hard or easy as you want. If you like good MVs, don't skip out on this one!
yes i would recommend this game. however, if I were to make a game, I wouldn't make it a browser-server or whatever this game is... I don't know what it means but I don't like it... but the game itself is very good, I love dogs and I love my dog and this game is very doggy.
After 6h it started crashing very frequently
👍
Un metroidvania que me ha sorprendido gratamente https://youtu.be/766qdwbaOqs Si te gusta el genero ni lo dudes
Mixed bag of nice ideas with awful execution. Too many one hit obstacles that don't offer an actual fair challenge. Runs poorly as well with too much input delay or just eating inputs.
Players by region
Where this game's players are, estimated from review languages.
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