Early Access
Is Mission To Fission still being updated?
No. Last updated 15 months ago, with no recorded updates per month, and nothing new since.
Last checked Oct 22, 2026
No recent updatesAll no recent updates games
About the game
Nuclear fission simulator. Control A nuclear reactor, balancing Uranium fissile material. The game features a oversimplified reactor and the R.B.M.K Reactor in Chernobyl.
Update history
Recent updates
Jul 20, 2025 · Patch note
Small visuals changes and beta build for new reactor type. (opens in new tab)
Dear everyone thanks for waiting for the update. I want to give you some insights. In this release there are some small visual improvements. (Like neutrons fading when absorbed). There is also some works on the next reactor type which should be a light water reactor, with the water flowing around to a "steam generator". The plan is to let the user be able t…
Jul 20, 2025 · Build
Public branch build 19208113
Latest build time Steam reports for the public branch.
May 25, 2025 · Patch note
Thank you everyone (opens in new tab)
Thank you everyone for trying out the small simulation! It's very exciting to hear all the positive experiences. If you have any idea for improvements, anything, let us know! We are working on making the Light Water Reactor, where water is free to move around the reactor and warm up a heat exchanger, and also thinking about how to make the game loop more en…
Questions
When was the last Mission To Fission update?
Mission To Fission last posted a patch note 15 months ago (Jul 20, 2025: Small visuals changes and beta build for new reactor type. (opens in new tab)).
How often does Mission To Fission update?
It got no recorded updates per month over the last year and is rarely updated (0/100). 0 of the last 12 months had at least one update day. Not enough of a cadence to call it regular.
Is Mission To Fission abandoned?
Yes, it looks that way. There have been no builds or patch notes in over 180 days, or none on record at all.
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