Steam app 668580 · updated 11 Oct 2026, 14:20 UTC
In a mad and sublime utopian world, take part in explosive encounters. Adapt your fighting style to each opponent, use your environment and upgrade your equipment to fulfill your mission. If you want to reach the truth, you'll have to pay in blood.
717 hourly samples, with the daily peak drawn over them. Weekends are shaded.
49 months, December 2017 to October 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
14 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
30 days as the curve, each the highest figure that day. Behind it, 343 hourly samples from 16 Sep, which is as far back as the source keeps every hour. Weekends are shaded.
16 days as the curve, each the highest figure that day. Behind it, 374 hourly samples. Each dip is a night. Weekends are shaded.
Blood and Gore Intense Violence Language Nudity
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| English | ● |
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| Spanish - Spain | ● |
| Japanese | ● |
| Russian | ● |
| Simplified Chinese | ● |
| Korean | |
| Polish | ● |
| Portuguese - Brazil | ● |
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| Ukrainian |
A blank audio cell means full audio was not marked in the returned language list.
Atomic Heart - Blood On Crystal Launch Trailer
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Atomic Heart - Launch Trailer
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Atomic Heart - Combat Trailer
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Atomic Heart - Story Trailer
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Atomic Heart - Gameplay Overview Trailer
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Atomic Heart - Annihilation Instinct Launch Trailer
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Atomic Heart - Trapped In Limbo Launch Trailer
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Atomic Heart - Enchantment Under the Sea Launch Trailer
Watch on Steam82 achievements in total.
50 developer announcements, Jan 2025 to Oct 2026 · times in UTC
Steam Autumn Sale is here! Grab Atomic Heart with our biggest discounts yet - up to 80% off, including Ultimate Edition!⚡️Whether you’re stepping into Facility 3826 for the first time or coming back for more, there’s never been a better…
Team_MundfishThe Steam Sale is in full swing! Grab Atomic Heart, including Ultimate edition, with our biggest discounts yet - up to 80% off!⚡️Whether you’re stepping into Facility 3826 for the first time or coming back for more, there’s never been a…
Team_MundfishReverse: 1999 × Atomic Heart Collaboration Version is NOW AVAILABLE! We have arrived at your destination, the Polymer Exhibition Hall. Please be careful when exiting the vehicle. We wish you a pleasant journey! Reverse: 1999 × Atomic Heart…
Team_MundfishAttention, Comrades! The temperature is rising because of the super hot Steam Summer Sale 🔥Save up to 75% across the entire Atomic Heart catalog, with the Ultimate Edition receiving the absolute maximum discount!Hurry to smash robots until…
Team_MundfishThe first chapter of Atomic Heart is complete.💎Now it's time to look back. We'd love to hear how this journey felt for you - from your first steps on the Wave Platform to the final credits.Share your feedback in our…
Team_Mundfish📸 VIRTUAL PHOTOGRAPHERS, UNITE! 📸 We’re launching a Photo Mode Contest on X (ex-Twitter) in collaboration with CoalaTV - 6 winners across 2 categories.🏆 🩸 Best shot from DLC#4⚙️ Best shot from the base game & 3 previous DLCsUp to 4 entries…
Team_MundfishThe final chapter is here. All the answers are revealed, all threads have come together.⟡But to truly feel it, you have to see the path that led here. The key events and turning points of the main game and previous DLCs are now woven into a…
Team_MundfishPatch 1.16.3.0 for Atomic Heart is rolled out and now available on Steam. See the list of changes for this update below:Blood on Crystal DLC#4 changes:Fixed missing music in the area with the polymorph pianistFixed an issue where brightness…
Patch notesTwin or NORA?😏 No need to choose! Both plushies by Youtooz are live! TWIN NORA Only available until May 8th, 12pm PT - don’t miss out!⌛️
Team_MundfishWatch the developers play Atomic Heart's DLC#4 Blood on Crystal!
AntoineThe Steam Sale is live - right as the story enters its final stretch.😱 Atomic Heart is up to 75% off, including the NEW Ultimate Edition - the most complete way to experience the journey from beginning to end. No better moment to step in…
Team_MundfishThe wait is over. ⌛️ 🩸 Blood on Crystal, the final DLC#4, is out now! The epic conclusion of #AtomicHeart’s first part offers shocking revelations, new elemental enemies, the mightiest arsenal and the most insane bosses. The all-out bloody…
Team_Mundfish⌛️ The wait is almost over!Check out the new Animated Key Art and get ready to join P-3 and the Twin in a decisive fight against CHAR-les and the full robotic might of Facility 3826. 🤖The final DLC#4, Blood on Crystal, concludes the first…
Team_MundfishSpring is in the air - and so are the savings!🌸 Atomic Heart is now up to 75% off in the Steam Spring Sale, with great deals on all three DLCs as well. Time to jump in, finish what you started, or experience it all over again. ⌛ Don’t miss…
Team_MundfishThe sound of Atomic Heart is coming to vinyl!🤩Together with Kid Katana Records, we’ve teamed up on a special 2LP release featuring music compilation from the main game and all DLCs - including tracks by Geoffrey Day, Mick Gordon, and…
Team_Mundfish🛒 The Steam Sale is on! 💥 Up to 75% OFF! ⚙️ Great discounts on all 3 DLCs! Perfect timing too - DLC#4: Blood on Crystal arrives April 16, concluding the story of #AtomicHeart’s first part. Catch up on the journey so far and get ready for…
Team_Mundfish🩸 Blood on Crystal, the final DLC#4, concludes the story of #AtomicHeart’s first part on April 16! P-3 and the Twin venture into the Crystal Complex to face CHAR-les in an all-out bloody showdown against new enemies—Polymorphs—and the most…
Team_MundfishThe research complexes in Atomic Heart were initially imagined not as game locations in the typical sense, but as autonomous R&D establishments. Each has its own objective, specialty, internal logic, and history that determine its…
Team_MundfishThe calm is over. The storm is almost here. ⛈️ P-3 and the Twin must venture into Facility 3826’s most classified complex to face CHAR-les in the battle for the world’s fate. 🤖 Calamity is inevitable: final DLC#4 will conclude the story of…
Team_MundfishThe Steam Winter Sale is live!❄️ Atomic Heart is now available with discounts of up to 75% 🏷️ - all the way through January 5, 2026⏳ If you’ve been waiting for the right moment to step into the retrofuturistic world of Facility 3826 - this…
Team_MundfishHave you seen the DLC#4 teaser?Time to jump in for the first time or catch up with the DLCs, as #AtomicHeart Steam Sale is live!Step into a twisted utopian world and uncover its secrets.💥 Up to 70% off on all editions and DLCs!⏰ Hurry…
Team_Mundfish👀 Take a first look at thrilling DLC#4 concluding #AtomicHeart Part 1! What's ahead for P-3, Twin, and their comrades?💍 Hand in hand, amid the screech of metal, the Nechaevs start a final battle with CHAR-les, who unleashes the full robotic…
Team_Mundfish🍂 The Steam Autumn Sale has arrived - and Atomic Heart is bringing the heat straight into the fall! Journey through Facility 3826 and beyond with up to 70% on all editions, plus big savings on all DLCs!⏳ Offer ends October 6 at 10 AM PT…
Team_MundfishInitial sketches: A scientist in the shadowsWhen the foundations of the Atomic Heart universe had only just been outlined, Dr. Alexey Lebedev already existed in script drafts. At first, he was just a name in the documents: a mathematician…
Team_Mundfish🏭Set out on an unforgettable journey through Facility 3826! During the Steam Sale, get up to 70% off Atomic Heart along with big discounts on DLC#1 and DLC#2. ⏳Offers last until September 15 at 10 AM PT - don’t miss out!
Team_Mundfish🌞 The Steam Summer Sale is HERE - and Atomic Heart is diving in headfirst with its biggest discount EVER! Explore Facility 3826 and beyond with up to 70% off the base game, plus major savings on DLC#1 and DLC#2. ⏳ Available until July 10 at…
Team_MundfishWISHLIST NOW ⬇️ The CUBE: Atomic Heart 2:ILL:It all started with a dream. Now it’s time to take the next step. 🦾Watch the extended version of our new games Showcase, where Robert Bagratuni, founder of Mundfish, shares details about Atomic…
Team_MundfishWe are proud to present 3 new upcoming titles - two expanding the Atomic Universe, and one debuting under the Mundfish Powerhouse label.Atomic Heart 2 is an action-adventure role-playing game that brings you back to a retrofuturistic…
Team_MundfishLess than 2 days to go! 👀 We’ll be part of Summer Game Fest 2025 - don’t miss the livestream! 📅 June 6 | ⏰ 2 PM PT 📺 Watch here: https://www.youtube.com/live/-Hr6Q2hln_M
Team_MundfishIt's official! We’re part of Summer Game Fest 2025 - airing live on June 6, 2 PM (PT). 📺 Tune in and watch it unfold.
Team_Mundfish💥 Atomic Heart has officially hit 10 MILLION players worldwide! 💥 What started as a dream has become a reality beyond anything we imagined. This achievement is the result of our team’s relentless dedication, bold vision, and unwavering…
Team_MundfishSome bonds are too strong for one screen.📲🖇 The Twins are closer than ever in this sweet paired artwork - now available as mobile wallpapers. Perfect for matching lock screens or sharing with a friend. 🔗 CLICK HERE! 🔗
Team_MundfishSometimes, a single sigh is all it takes to slip back into the world of Atomic Heart. We’ve curated a small collection of the Twins’ signature sounds - unmistakable and hypnotic. 🎧Set them as your notifications, alarms, or ringtones - and…
Team_MundfishHappy International Workers' Day, comrades! 🌸🔧 Today is the perfect moment to wish you more than just success - enjoy the journey, find inspiration in your craft, and take pride in everything you achieve.💪🏻…
Team_MundfishNikolai is a brilliant engineer and a walking toolkit powered by sheer charisma.⚙️ Want to bring his complex, detail-packed look to life? Our cosplay guide will help you assemble it piece by piece! ➡️ CLICK THE LINK TO DIVE IN! ⬅️
Team_MundfishMeet Raf-9, the Ultimate Engineering Buddy!🤖 Tired of fixing things alone? Meet Raf-9 aka Rafik, the cutest little engineer robot who’s always ready to assist… emotionally, at least! This plush version of the legendary tech whiz won’t…
Team_MundfishA bit dark, mysterious, yet always ready to lend a hand…One of the most brutal looks from DLC#3 is here! Want to recreate Hunter's style? Our cosplay guide will show you where to start.🔥 ➡️ CLICK TO DOWNLOAD ⬅️
Team_MundfishThe time has come! 👀 We're finally releasing the long-awaited 6-hour Twins scene, which will amuse you more than the Avengers: Doomsday announcement 🧯🔥:
Team_MundfishWhile creating characters for DLC 3, we spent countless hours working on their personalities, roles, and interactions in the game world. Each of them fleshed out the game's universe with new details and added additional depth to the story.…
Team_Mundfish🌸 Spring is here, and so are the savings! 🌸 For a limited time, grab Atomic Heart at up to 67% off on Steam! It’s the perfect moment to dive into a world of thrilling battles and unsolved mysteries. 📅 Don’t wait! The sale ends March 20 at…
Team_MundfishSink into the depths of the unknown, where silence meets the storm... with Øneheart 🌊✨
Team_MundfishDLC#3 has been out for over a month! ✨🐬 What moments left the biggest impression? And what could be improved? We’d love to hear your thoughts! 📝 TAKE THE SURVEY Thank you for playing and helping us make the game even better! 🚀
Team_MundfishDiving into cosplay? Our Nastya guide will help you transform into the most effortlessly cool ichthyologist around.😊 Follow the steps, perfect the look, and get ready for an ocean of compliments!🐬 ➡️ CLICK HERE TO DOWNLOAD ⬅️
Team_MundfishYour favorite heroes, always at your fingertips!📱✨ Hunter, Nikolay, and Nastya are ready to light up your screen! Download the new wallpapers now and take the characters with you wherever you go.💥 🔗 CLICK HERE 🔗
Team_Mundfish🎙 Imagine hearing AND seeing yourself in a game! That’s exactly what happened to Kyle Hill, science educator and YouTuber, who voiced Nikolay in the English version of DLC#3 and became his visual prototype. In this interview, he talks about…
Team_MundfishUpgrade your view with something new!💻📱 To celebrate the arrival of DLC#3, we’re bringing you some truly enchanting wallpapers for desktop and mobile. Let the underwater adventure take over your screens!🌊 📥Download now!
Team_Mundfish🌊Dive into new adventure with DLC#3 "Enchantment Under the Sea"!🌊 💥 Get Atomic Heart at up to 67% off on Steam! Now’s your chance to unleash madness and explore the mysteries of the deep! Hurry! Sale ends February 3. ⚡️ Grab your copy and…
Team_Mundfish🌊 #AtomicHeart: Enchantment Under the Sea DLC#3 is available now! 🌊 🎮 Return to Facility 3826 and continue the story, as P-3 and Twin dive into the uncharted underwater complex to save humanity. 🔥 New characters, weapons, abilities, enemies…
Team_MundfishWith 2024 behind us, we can’t thank our amazing fans enough for your unwavering support! Last year’s achievements were truly earned through dedication and passion, but there’s still much more to accomplish. Stay tuned - 2025 will bring even…
Team_Mundfish⏳ Brighten up the wait for Atomic Heart: Enchantment Under the Sea DLC#3 with Animated Key Art! 🌊 Meet new characters and return to Facility 3826 as Major P-3 and Twin at his side dive into the uncharted underwater complex to save all…
Team_MundfishEverything Steam lists as add-on content for this game, newest first. Prices are left out on purpose: the store answers this page in one currency and it is not the reader's.
| Name | Platforms | Released |
|---|---|---|
| Atomic Heart - Blood On Crystal | Windows | 16 Apr 2026 |
| Atomic Heart - Enchantment Under the Sea | Windows | 28 Jan 2025 |
| Atomic Heart - Trapped in Limbo | Windows | 06 Feb 2024 |
| Atomic Heart - Annihilation Instinct | Windows | 02 Aug 2023 |
| Atomic Heart - Original Soundtrack | WindowsmacOSLinux | 20 Feb 2023 |
| Atomic Heart - Midas Glove Skin | Windows | 20 Feb 2023 |
| Atomic Heart - Digital Artbook | Windows | 20 Feb 2023 |
| Atomic Heart - Golden Age Weapon Skin Pack | Windows | 20 Feb 2023 |
| Atomic Heart - Labor & Science Weapon Skin Pack | Windows | 20 Feb 2023 |
What Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | AtomicHeart.exe | windows 64 | ||
| AtomicHeart-Win64-Test.exe | \AtomicHeart\Binaries\Win64\AtomicHeart-Win64-Test.exe | windows 64 | branch fe_qa,nvidia,nvidia_sl,nvidia_dev |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
WinAppDataLocal | AtomicHeart/Saved/SaveGames | *.sav |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG