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.
This low-stress idle game keeps running while you are away, but it is not a numbers-go-up experience. Most of your time goes into keeping the water clean, feeding the inhabitants and petting the creatures. The free demo includes pond and river aquariums, while the open ocean is still locked; there are more than 200 creatures to find, each with a logbook entry. Filters, nets and spears are used to handle litter and trouble, and a dead fish leaves a blood trail that draws predators, so letting things slide has consequences. No account is required.
A Command & Conquer style RTS built by Simon Willison almost entirely with Claude Opus 5.5 and Claude Code: skirmish, Last Stand survival, daily ops, an eight-mission campaign and AI-vs-AI matches, with fog of war and 3D models generated fully in code.
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.
A free procedural driving game built with Three.js, where you cruise endlessly through generated hills with a day-night cycle and changing weather.
Pirsch is a dark fantasy card game in which you place beasts on three trails, flip cards and fight. It runs free in the browser without an account.