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.
Tempora is a free, open-source browser life simulator set across roughly twelve thousand years, from 10,000 BC to a far-future era. You choose where and when to be born, then live one year at a time, and can continue through your children, relatives or acquaintances. The world simulates all inhabitants: settlements grow and are abandoned, farming and copper spread on historical dates, migrations shift ancestry, and governments fall or declare wars. Characters have inherited genetics, personality traits, social class, fame and family. Play covers school and careers, marriage and children, courts and inheritance, sports and politics, with communication that changes over eras from letters to phones to social media and neural chat. It runs as a single HTML file that also works offline and installs as an app on phone or desktop; no ads and no account required.
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 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.
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.