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Manage BioFission Research's new highly unstable prototype nuclear reactor codenamed "Project Vermillion," produce enough power to satisfy demand and turn a profit, all while preventing it from destroying the entire facility.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest ends
A reactor simulation game, where you play as a new reactor operator, tasked with keeping "Project Vermillion," the new highly-unstable prototype reactor from BioFission Research safe.
Manage critical systems, like pressure, temperature, power output, feedwater levels, and most importantly, profit. Defend the reactor from mindless killing zombies we call "experiments," soulless saboteurs hired by big oil, and the tactical law-enforcement agents who found out too much about what happens inside the facility.
Play one of the four tuned difficulties alone, or bring some friends along for a more challenging experience with up to four players. Explore and manage the simulation, manage your funds, and keep the reactor stable for long enough to beat high scores, before the inevitable happens.
Lowest tracked price: CA$3.89 (Jul 7, 2026) · current best: CA$3.89.
Right now the cheapest offer for Protocol Meltdown is CA$3.89 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Protocol Meltdown is CA$3.89 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Create a free price alert on this page and KingsPrice will email you when Protocol Meltdown drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
