2025 Challenge: JS13K Online

We're thrilled to announce that JS13k's newest partner, Cloudflare, is sponsoring the JS13K Online category for this year's JS13K competition!

The JS13K Online category challenges developers to create MMO (Massively Multiplayer Online) versions of their games. This experimental category is powered by a JS13K-hosted version of PartyServer, Cloudflare's PartyKit-inspired scalable server based on Cloudflare Workers.