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Watch trailer on Steam ↗MassEve
Revera · Published by Revera · Official site ↗
Last updated 4 Oct 2026
You are a massive neutrino. Craft quantum builds, clash with other subatomic particles, and survive a universe that reshapes every run. A fast-paced twin-stick roguelike where real physics bends the rules.
Action, Indie · 2026 · More free games
MassEve challenges you to pilot a colossal neutrino, crafting and battling through ever-changing cosmic corridors. Experience fast-paced roguelike action where real-world physics twist the rules in this indie gem from 2026.
About this game


Choose from a wide range of quantum tools, each with unique playstyles and surprising synergies. Weapons and upgrades let you shape every run, crafting builds that reflect your approach to conflict. Unleash attacks that bend space, manipulate mass, and unlock your full potential.

Lose yourself in the relentless frenzy of the quantum realm, where hesitation is not an option. Momentum is survival: the faster you move, the longer you endure. Slow down and decay will inevitably catch up with you, speed up and you'll outrun your own collapse.

Dive into a vibrant cast of quantum entities, each inspired by real subatomic particles, in a world entirely grounded in scientific principles. From swift neutrinos to volatile quarks and enigmatic bosons, every character, environment, mechanic, and enemy is shaped by the laws of physics. Wave-particle duality, entanglement, vacuum fluctuations, and more are not just concepts, but systems you will play, master, and survive within.

As a massive neutrino, you'll journey through the ever-shifting depths of the subatomic universe. Face the elusive Higgs Bosons and chase the shadows of a hidden force that defies all known physics, in a realm where reality bends, probabilities collapse, and every particle holds the key to rewriting the universe.
You are not a single being. You are a population. Entanglement gives you a shared consciousness projected across multiple units. Every failure is just another observation. Every return, another chance to collapse. Start over, but carry with you what you’ve come to understand.

Each time you start over with a new neutrino, a fresh configuration awaits: rooms, paths, and weapons are reshuffled to offer a constantly changing challenge. No run is ever the same! Your combat style shifts, your discoveries vary, even your enemies evolve. Get ready to adapt, explore, and uncover new combinations every time.

The quantum universe of Mass Eve is unstable, on the verge of collapse, and searching for balance. Two opposing forces struggle to shape its fate: one pushing toward entropy and radical change, the other seeking to preserve order and the coherence of fundamental laws.
Your actions, the alliances you forge, and the systems you choose to defend or dismantle will determine the weight of your trajectory. In a world where every observation has consequences, choice isn’t an option—it’s inevitable.
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System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit
- Processor: Dual Core 2.4 GHz
- Memory: 8 GB RAM
- Graphics: GeForce GTX 950, Radeon R7 360, or Intel HD Graphics 630
- DirectX: Version 11
- Storage: 6 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit
- Processor: Quad Core 2.4ghz
- Memory: 8 GB RAM
- Graphics: GeForce RTX 2050, RX 6400, or Intel Arc A580
- DirectX: Version 11
- Storage: 7 GB available space
Supported Languages
Latest news
Patch NotesOfficial
Next Fest Demo Fixes
Ciao everyone!First of all, thank you to everyone who has played the Mass Eve demo so far. Your feedback is already helping us a lot, and we’re working to improve the experience as quickly as possible.We’ve just released a new update with the following fixes and improvements:Fixed a bug that could lock the game when using the Restart buttonNow the reroll button increases in cost in the shops every time you use it, resetting each run.The rarity of the charms now influence both the spawn rate in the run and the probability to find them in the shop once unlocked.Fixed a bug that prevented durability from being infinite when it was supposed to be (from the starting shop). Also the durability counter now is shown in the build menu as well.Added health indicators for enemiesImproved charm slot readability: locked slots now show a lock icon, and the shop button used to unlock them is now more visibleWe’re also aware of a blocking bug in Arena Mode where, in some cases, the player enters the combat area but enemies do not spawn, preventing the run from continuing.This is currently the main issue we’re working on, and we’ll update the demo again as soon as possible.Thanks again to everyone who is playing, testing, reporting bugs, and sending feedback.As always, you can join our Discord to ask us anything, report issues, or just talk with us directly. We’re there, and we’ll answer!Read full article on Community Announcements (UB3)AnnouncementsOfficial
DISCOVER THE GAME WITH ITS CREATORS
Tune in for a special broadcast where the developers of MassEve celebrate the start of the June Steam Next Fest!Read full article on Community Announcements (dev)AnnouncementsOfficial
DISCOVER THE GAME WITH ITS CREATORS
Tune in for a special broadcast where the developers of MassEve celebrate the start of the June Steam Next Fest!Read full article on Community Announcements (dev)AnnouncementsOfficial
DISCOVER THE GAME WITH ITS CREATORS
Tune in for a special broadcast where the developers of MassEve celebrate the start of the June Steam Next Fest!Read full article on Community Announcements (dev)AnnouncementsOfficial
DISCOVER THE GAME WITH ITS CREATORS
Tune in for a special broadcast where the developers of MassEve celebrate the start of the June Steam Next Fest!Read full article on Community Announcements (dev)






