Reactor ZeroNew tab
Loads from reactorzero.pl when you press play.
Reactor Zero cover art

Shooter · Browser game

Reactor Zero

  • Beta

Released October 14, 2026 (3 weeks ago) · by Reactor Poland

Facebook

Runs in any browser — no download, works on Chromebook

About Reactor Zero

Reactor Zero is a fast-paced multiplayer browser co-op action game where players choose classes and defend a core against waves of enemies.

Screenshots and video

Playing with other people

Up to 3 players. Co-op works online. You can drop into a game already running.

  • Online multiplayer
  • Co-op
  • 3–4 players
  • Drop-in

Tags and modes

Languages

Reactor Zero: questions and answers

Can I play Reactor Zero in my browser?
Yes. Reactor Zero runs right on this page — press Play at the top. There is nothing to download or install, and it works in any modern browser, Chromebooks included.
Who made Reactor Zero?
Reactor Zero was made by Reactor Poland and came out in 2026.

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