Decay
Smash atoms together — chase ever-larger nuclei and uncover every isotope through cascading decay chains.
An incremental about nuclear chemistry. Aim your trusty (dumpster-found) particle launcher to fuse atoms into ever-larger and more unstable nuclei, watch the cascading decay chains, and try to discover every isotope in the periodic table. Released May 2026.
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Frequently asked questions
- 01Is Decay free to play?
- Decay is available to play online — check the store links for current pricing.
- 02What platforms can I play Decay on?
- Decay is available on Steam.
- 03What kind of game is Decay?
- Decay is an incremental idle game, featuring reddit community, indie, collection and science.