Decay

Decay

Racctuality · May 26, 2026 · Idler, Simulation, Science, Automation, Physics

Buy Decay from Steam at $24.99 — the cheapest of 1 store we compare.

PC
4 user reviews100% · 4
Best price
$24.99
lowest tracked $3.59
Steam Buy at Steam

Prices last checked

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Where to buy Decay — official stores

Steam
Steam
Standard Edition · Steam
$24.99
Buy

Decay price by region

Decay costs £20.99 in the United Kingdom, €24.50 in Europe (EUR), $24.99 in the United States, $24.99 in Georgia (USD), CA$32.50 in Canada, NZ$35.99 in New Zealand, A$36.50 in Australia, R$73.99 in Brazil and zł114.99 in Poland right now.

Cheapest Decay offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £20.99 £20.99 — 1
Europe (EUR) €24.50 €24.50 — 1
United Statesyour region $24.99 $24.99 — 1
Georgia (USD) $24.99 $24.99 — 1
Canada CA$32.50 CA$32.50 — 1
New Zealand NZ$35.99 NZ$35.99 — 1
Australia A$36.50 A$36.50 — 1
Brazil R$73.99 R$73.99 — 1
Poland zł114.99 zł114.99 — 1

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About Decay

Game Summary

Decay is an incremental game in which you are tasked with using your trusty particle launcher (which may or may not have been found in a dumpster out back of the laboratory) to create ever-larger and more unstable atomic nuclei, witnessing longer and more complex atomic decay chains and aiming to discover all the isotopes!Configure your particle launcher with the right number of protons and neutrons, then hit launch to see your particle. Earn money for successful experiments, and spend that money on additional upgrades to earn even more money. Earn, spend, earn, spend, earn spend...you know how it works by now.

Gameplay Features

  • LAUNCH PARTICLES - Create your concoction of protons and neutrons to forge atomic nuclei in your (very scientific) question to discover new and ever more unstable nuclei.
  • UPGRADE YOUR LAB - Unlock a wide range of upgrades to improve your laboratory and expand your capabilities.
  • AUTOMATE AND EXPAND - Build additional test chambers and set them to automate multiple experiments in parallel.
  • DISCOVER RARE ISOTOPES - With hundreds of isotopes available to be discovered, can you find all the combinations?
  • OBSERVE REAL SCIENCE - Study the real decay chains of atomic nuclei. Do you, like all very normal people, have a favourite isotope? See how it is formed, and how it might decay!

Additional Information

  • BUY ONCE, PLAY FOREVER - We at Racctuality are committed to a policy that ensures those purchase our games are entitled to any future updates, never locking future gameplay content behind a paywall for a game you have already purchased. So long as the choice is ours to make, paid gameplay DLC will never exist for our games. (The only exception to this rule will be if ever we release purely non-gameplay content, for example concept art or a soundtrack.)

Decay — game info

Platforms
Windows
Player modes
Single-player
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jun 7, 2026
Any bugs I encountered and reported have been investigated quickly and the fixes are released surprisingly fast. It's refreshing to see a developer so actively involved with the community and committed to improving the game.
Recommended May 28, 2026
Fun little educational game, with an active developer. I was confused regarding some of the tutorials, and the dev reworded parts of it and updated the game literally an hour or two later. So, I'm already recommending it based on that alone, however the game itself deserves recognition too. I've always been fond of science, especially chemistry and physics, however after high school "life happened", and I never really delved into that part of my life again. Picking this game up has rekindled my love of chemistry and physics, and I've started re-teaching myself some principles I'd forgotten (especially around alpha and beta decay, which plays a fairly large role in this game). If you have an interest in science, you will enjoy this game. And, it's super cheap too. I paid more for an imported can of Monster this morning than I did for this game last night. Huge recommend
Recommended May 27, 2026
Had a problem that the dev didnt have to fix but he did so anyway.The idea is interesting educational and the game cheap give it a try i believe its worth it.

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