Zentra

Zentra is a browser third-person arena shooter. A Next.js + React Three Fiber client renders a forest map. A NestJS server runs the match. The two talk over one socket.io connection for everything real-time, and over REST for durable profile data. Supabase handles login. Redis holds only the current match. Postgres (via TypeORM) holds only lifetime kills, deaths and match counts.

The server is authoritative about who got hit and whether they died. It is not authoritative about where players are: the client reports its position every frame and the server stores and rebroadcasts it. Shots are hit-tested on the server, rewound slightly for the shooter, and can be vetoed by terrain and trees. Bots are ordinary player records driven by the same movement and combat functions a socket would call. The client has no bot-specific code.

A match lasts 10 minutes. A new room starts with five bots, and later players join the existing room, so a match is a rolling world rather than a fixed lobby.

• What happens when you get shot: hit registration in a browser shooterServer authority, lag compensation, capsule hit tests and race-free kills in Zentra.

Zentra was a pet project and is discontinued from further development.