Is React a good choice for a browser game?

The right call when the game is mostly interface: cards, menus, inventories, numbers going up. The wrong call for anything that needs to redraw the whole screen sixty times a second.

How do you know these games were built with React?

Makers pick their tools from a list when they submit, and that is what this page filters on. It is self-reported and nobody audits it, so treat it as a credit rather than a certificate. Where a game links its source, you can go and look.

Do I need React to play these games?

No. React is what the maker built with; the game ships as a page you open in a browser. Nothing on this list needs a plugin, a launcher or a download.

Where should I start if I want to build with React?

Open the source link on any game here that has one, then read the official documentation at react.dev. Reading one finished small game teaches more than a tutorial series, and a good number of makers on this site publish their repositories.

What kind of games do people make with React?

Across the 20 games on this page, the most common categories are puzzle, strategy and narrative. That is what makers actually shipped, counted from the listings themselves rather than estimated.