A multiplayer browser flight simulator famously vibe-coded in a weekend with Cursor and Grok 3 — now a full open world with other players, planes and chaos, reportedly earning thousands per month.
Fly, Pieter is the viral multiplayer flight simulator that started as a weekend vibe-coding experiment built almost entirely with AI tools (Cursor + Grok 3). Fly around a persistent open world, meet other players mid-air, try stunts, or just cruise above the clouds. It became one of the most famous proof-of-concept stories of the AI game dev era and kept evolving with community-requested features.
Cozy Aquarium is a free idle aquarium simulation playable in the browser and on mobile, with no sign-in needed. You begin with a single bubble and build up a pond or river filled with fish, frogs, turtles, crabs and plants.
A life simulator across twelve thousand years. Be born anywhere from 10,000 BC to the far future and live one year at a time in a living world of dynasties, migrations, wars and politics. Free, open source, one HTML file.
A cute 3D farming playground where you play a chicken: collect golden eggs, hatch chicks and explore a bright, chunky low-poly farm with classic WASD controls.
A Ray Vibe Awards honorable mention: rover racing powered by the setting sun — fast, smooth momentum in a gorgeous low-poly desert as daylight fades.
I made this game with the new Gemini TTS, it generates the voices from a description and has really warm inflection
Civitas is a browser-based multiplayer city builder built with three.js on the client and an authoritative TypeScript simulation server over WebSockets. Players buy and manage land parcels, zone land, build roads and set tax rates; citizens are simulated individually, living where they spawned, finding the nearest job on the connected road network, commuting daily, and paying income tax to the parcel owner where they work and property tax to the owner where they live. It runs in the browser and can also be self-hosted via the repository.