Hamstr Protocol
MoonBag Studio · released Nov 8, 2026
Build a hamster-powered bio-mining operation from the ground up. Assemble rigs by hand, manage heat, feed your runners, and keep production moving. Start in a garage, optimize every part of your operation, and scale into a full-scale industrial operation.
Price
-15%$6.79
$7.99
Reviews
87%
16 · Positive
Playing now
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not sampled yet
24h peak
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all-time seen —
Followers
—
Steam community hub
Owners (est.)
~480
240 – 768
YouTube activity
11
videos · 30 d24
creators17.7K
views · 1 yTwitch activity
0
avg viewers · 30 d2
hours watched · 30 d1
streamers · 30 dProduct info
from Steam's PICS · read 1d ago- Change number
- 40,877,453 · seen 1d ago
- Public build
- 26,620,481 · Nov 12, 2026 (1d ago)
- Operating systems
- windows
- Architecture
- —
- Install size
- 1.1 GB · 588 MB download
- Install folder
Hamstr Protocol- Controller support
- Partial
- Metacritic
- —
- Homepage
- —
- Release state
- released
- Community
- hub · stats
Steam Deck
UnknownNo Deck test results published.
Branches · 1
every build Steam serves for this app| Branch | Build | Updated | Description |
|---|---|---|---|
| public | 26,620,481 | Nov 12, 2026 · 1d ago |
Build history
every build id we have seen on a branch (history starts with our first read)| Build | Branch | Released | First seen |
|---|---|---|---|
| 26,620,481 | public | Nov 12, 2026 15:08 | 1d ago |
| 26,596,184 | public | Nov 11, 2026 16:27 | 2d ago |
| 26,576,752 | public | Nov 10, 2026 21:46 | 2d ago |
| 26,561,605 | public | Nov 10, 2026 09:24 | 3d ago |
| 26,541,182 | public | Nov 9, 2026 14:07 | 3d ago |
Depots · 1
content of the public branch| Depot | Name | OS | Language | DLC / shared | Size | Download | Manifest |
|---|---|---|---|---|---|---|---|
| 4708031 | all | 1.1 GB | 588 MB | 9015531934220451148 |
Launch options · 1
| Executable | OS | Description |
|---|---|---|
HamstrProtocol.exe |
windows 64-bit | Play Hamstr Protocol |
Languages · 7
| Language | Interface | Full audio | Subtitles |
|---|---|---|---|
| French | ✓ | — | — |
| German | ✓ | — | — |
| English | ✓ | — | — |
| Russian | ✓ | — | — |
| Spanish | ✓ | — | — |
| Japanese | ✓ | — | — |
| Simplified Chinese | ✓ | — | — |
Packages · 1
all packages| Sub | Name | Billing | Price |
|---|---|---|---|
| 1638347 | Hamstr Protocol | Store or CD key | -15%$6.79 |
Bundles · 0
all bundlesNot part of any bundle we know.
Change numbers
all changes#40,877,453 · 1d ago#40,841,697 · 2d ago#40,840,225 · 2d ago#40,817,207 · 2d ago#40,810,967 · 2d ago#40,809,972 · 2d ago#40,808,269 · 3d ago#40,795,921 · 3d ago#40,787,081 · 3d ago
Updates · patch notes
Steam announcements tagged as patch notes, linked to the public build they followed
| When | Note | Build | Update size |
|---|---|---|---|
| Nov 10, 2026 | Patch 1.0.3 Patch 1.0.3 - Changing the graphics preset in-game no longer freezes the game for several seconds - Graphics preset and resolution changes now apply smoothly, even when clicking through options quickly - Rig Terminal: new "Turn all off / Turn all on" button to switch every rig with one press - Hamster Feeder now unlocks at level 8 instead of 10 Thanks for all the feedback, keep it coming! |
26,596,184 | +5.3 MB |
| Nov 10, 2026 | Patch 1.0.2: Hamsters Live Longer Hello everyone! I saw that the main problem so far has been hamsters dying too fast, so here are a few balance changes for it. Here's another small patch!Patch 1.0.2:- Hamsters live longer.- Hamsters bought on the same day no longer all die at once.- Escaped hamsters are slightly slower, so they're easier to catch.- More Purple Syringes in stock, and they're cheaper now.- GPU Gold and Phantom mine |
26,576,752 | +10.1 KB |
| Nov 9, 2026 | Patch 1.0.1 Thank you to everyone who has picked up Hamstr Protocol so far! Your support means the world, and we hope you're having a great time with your hamsters. Here it is a small patch! Patch 1.0.1: - Purple Syringe stock increased- Build Mode now shows a "Next item" hint, so it's clear there are more decorations to pick from.- The Burrow archive search hides a few new secrets.- Fixed a bug that made the |
26,561,605 | +0 B |
| Jul 30, 2026 | Demo Update – Visual Refresh & Improvements Hello everyone!Here is today's demo update:• Reworked the house interior with improved details and color adjustments• Raised the ceiling height to make jumping over PC cases easier• Completely redesigned the Titan GPU model• Completely redesigned the game's logo• Added brand-new Steam capsule artworkThank you so much for all the wishlists, demo downloads, and feedback. Every update helps make Hams |
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| Jul 27, 2026 | Demo Update: Bug Fixes and Lighting Hello everyone!Here is today's demo update:• Fixed items not coming back from your second backpack slot after using the trash• Hamsters can no longer be thrown in the trash• Fixed the hamster stats card getting stuck on screen• Fixed buttons shrinking when clicked rapidly (auto-clickers)• Removed the blue tint that bled onto every object, interiors now look neutral• Toned down glow on bright surfa |
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| Jul 24, 2026 | Demo update: Controller support Hello everyone!Here is today's demo update:• Added partial controller support, including Steam Deck support• Added more decorations around the map• Improved UI hover and click sound effects• Made the UI feel more responsive and polished• Fixed various UI issues and minor bugs Thank you so much for 900 wishlists and all the feedback!Sebastian |
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| Jul 22, 2026 | Demo Update Hello everyone! Here is the new demo update:• Added an Unstuck Player button in the pause menu• Reduced player energy drain while cranking by 50%• Fixed a physics issue that could cause food items to gain excessive speed when colliding with the player• Fixed the recycle bin not displaying the correct amount of money when recycling multiple items at once Thank you so much for 750 wishlists and all |
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| Jul 17, 2026 | Demo Update Hello everyone! Here is the new demo update:Fixed noisy, grainy shadows on Medium graphics settingsSharper shadow edges on High graphics settingsEconomy balanceThank you so much for 400 wishlists!Sebastian |
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| Jul 14, 2026 | Demo Update Hello everyone! Quick update: we now have a Discord server!You can join it straight from the game:New Discord button in the main menu and the pause menuOne click takes you to the community serverCome share feedback, report bugs and follow what is coming nextJoin us here: https://discord.gg/HkdgmxfJqxThank you so much for the support and wishlists! Sebastian |
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| Jul 13, 2026 | Demo Update Hello everyone! Here is the new update: Global Leaderboard is here!The demo now has a global HAM leaderboard, right on your in-game phone:New Rankings app on the phone: top miners worldwide, plus a Friends tabYour all-time best save counts, not your current balanceAlready played? Just launch the demo once and your total is uploaded automaticallyIf your ranking shows 0, load your save and sleep onc |
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| Jul 12, 2026 | Demo Update Hello everyone! Here is the new update:Chubby Chow now holds 4 feed charges instead of 2Added a new food item: Chubby Chow Large, a bigger pack with 10 feed chargesRebalanced food energy: each feed now restores 30% energy instead of 40%Thank you so much for the feedback and wishlists!Sebastian |
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| Jul 10, 2026 | Demo Update Hello everyone! Here is the new update:New: Hamster AccesoriesA fresh pack of unlockable hats for your hamstersEarn them by playing: mining HAM, catching escaped hamsters, trading at the right price and moreEquip them from the customize menu, only unlocked hats are shown thereNew: HamDrip AppA new app on your phone that shows every hat and how to unlock itTrack your progress toward each unlock in |
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| Jul 10, 2026 | Demo Update Hello everyone! Here is the new update:Fixed major ultrawide screen issues - the game should now display properly on ultrawide monitorsFixed several inventory bugsPerformance improvementsVarious other minor fixesMore updates coming as we build toward full release. Thanks for playing the demo!Sebastian |
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| Jul 8, 2026 | Demo Update Hello, we reached 100 wishlists, thank you everyone. Here is the new update:Added 3 achievements to the demo: first rig, first GPU Titan, and one hundred grandMore updates coming as we build toward full release. Thanks for playing the demo.Sebastian |
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