VibeGameDB lists 11 games in this group, 9% of the 123 games on the Simulation page. Each one has a source for how it was made. The most common engine is Three.js (45%). 11 are free or free to play and 1 is paid; 9 can be played in a browser. The most recently added is 小さな帝国 (November 2026).
Ordered by editorial score, then player rating, then release date. Open a game for its sources.
A Chinese-language pixel life sim with branching timelines, mostly coded with Codex.
Plays instantly in the browser
Play free — official site
An experimental physics sandbox: spawn tetrahedrons as “facts”, join them into shapes and molecules inside a Klein-bottle universe, and share them with friends over a direct connection.
Download required
View on Steam
A cyberpunk ramen shop in the browser: balance richness, spice and sweetness to match each customer's order. Made for Gamedev.js Jam 2025 and, the developer says, written largely with Cursor.
Plays instantly in the browser
Play free — itch.io
Paddle into massive waves, carve across the breaking face and collect stars before the foam swallows you.
Plays instantly in the browser
Play free — official site
A top-down 3D space game in the browser: build your ship from parts on a grid, mine, trade and fight pirates in an endless universe. The developer designs and decides; AI coding agents (Claude Code) write the code, art scripts and music.
Plays instantly in the browser
Play free — official site
An unofficial browser tribute to Elite (1984): trade, jump, dock and fight across the original 2,048 seeded worlds in wireframe. The developer says Claude and other coding agents did all the work, without the developer ever looking at the code.
Plays instantly in the browser
Play free — official site
A cozy multiplayer sheep-farming game in 3D in the browser: build a shelter, raise 12 breeds of sheep, grow crops and share a farm with friends. The developer says GPT 6 Astra in Codex made it one-shot from a single /goal run.
Plays instantly in the browser
Play free — official site
Pick one of seven cars and drive a procedurally generated coastal city with simulation-grade physics, police chases and a helicopter at three stars. The README says Claude Opus 5.5 wrote it in Claude Code and nobody edited the code by hand.
Plays instantly in the browser
Play free — official site
A SimTower-style tower builder rebuilt around democratic socialism: you are the elected steward, and confidence is the score.
Plays instantly in the browser
Play free — official site
A free, open-source first-person 3D city with 40 kinds of jobs, salvage, a pawn shop, a subway and the developer's TikTok videos on its billboards. Created with Codex, per the developer.
Plays instantly in the browser
Play free — official site
A very small turn-based 4X in the browser: two workers, a 5×5 board and 15 technologies, racing a CPU city for food, production and gold. The developer made the design decisions and left the implementation to Claude Code.
Plays instantly in the browser
Play free — official site