ReactKingAbout
A fair test of reaction speed
ReactKing is a browser-based competitive reaction game built for short, focused one-on-one matches.
Why ReactKing exists
The game turns a simple reaction test into direct competition. Players can enter ranked matchmaking, challenge a friend, climb the global leaderboard, unlock achievements, and compete in scheduled tournaments.
Designed around fair results
Match state, timing validation, winners, ratings, and tournament progress are controlled by the server. The browser estimates timing for a responsive experience, but it does not decide the official outcome.
Built for the web
ReactKing runs directly in a modern browser with no download required. Guest play offers a quick start, while a registered account keeps ranked progress, achievements, and match history.