Simulation Browser Games Made with AI

Design road networks in 3D to keep a growing city moving.

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Grow, prune and shape a living bonsai tree in a calm 3D garden in the browser.

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Balance stacked cargo on a delivery robot across a ruined 3D world, in the browser.

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Fly from orbit down to a planet's surface — an OpenAI demo game built in Codex.

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A Chinese-language pixel life sim with branching timelines, mostly coded with Codex.

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A cozy browser life sim about working remotely while moving between cities.

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A cosy farming sim about growing a giant pumpkin for the October weigh-off.

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A free multiplayer flight sim in the browser, built by one person in Cursor.

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A real Famicom/NES game about running a chip fab from 1971 to AI superintelligence, wrapped for phone browsers. The developer says it was built entirely inside the Codex app, and lists Codex on the team.

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A map-based WWII submarine sim set in the Pacific: plot contacts, estimate range with a stadimeter and build firing solutions by hand. The developer says Codex wrote all of the code.

No download needed

Tap machines to make screws, grow a factory and launch rockets across six stars in this free browser idle clicker; its developer says Claude Code implements it and Codex reviews.

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Load cars onto a seven-car carrier trailer step by step, made by a working car-carrier driver who says Claude Code writes nearly all of its code.

No download needed

A free idle age-of-sail trading game in the browser, set from 1602, where you assign your fleet's tasks and let them run; the developer says it was vibe-coded over a weekend on the gameplay skeleton of 大航海时代 4 (Uncharted Waters 4).

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A Factorio-like factory game for the Nintendo DS, from cutting the first tree to launching rockets; the developer wrote the design and Claude Code wrote most of the C.

Download required

A free multiplayer brick-building world in the browser: build brick by brick on a shared map, then drive, fly, ride the bus or race. The developer says it was built with Claude Code (Opus 5.5).

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A free 2D roller-coaster sandbox with physics: draw the track, hit play and see whether the train makes it. The developer says it was vibecoded, first in Claude chat and then in Claude Code.

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A free idle game about growing a tiny contract software shop into a listed company, with Brooks's law from The Mythical Man-Month built into the rules. The developer left the implementation to Claude Code.

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A full-physics curling sim with seasons, a rink designer and a coaching mode, made by a club curler who leaned on AI to build it.

No download needed

A short tap-to-explore settlement game on a new planet, built mostly with Codex; zoom out from the 2D map to a 3D globe.

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A one-button orbital-mechanics game: chain gravity assists around real planets to escape the solar system before your fuel runs out.

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A rocket-launch sandbox about putting AI satellites into orbit: fly stage by stage from the pad to orbit insertion and unlock bigger rockets.

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Run an unlicensed basement surgery for aliens: saw, cut and electrocute for money. Vibe Jam 2026's “Most Cursed” award.

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A pixel-art beat-making RPG: produce beats in cities around the world, get reviewed by local critics and earn each city's sound-system rig.

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Paddle into massive waves, carve across the breaking face and collect stars before the foam swallows you.

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Craft drinks, serve customers and grow a cozy corner café into a café empire.

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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.

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SimCity 2000 rebuilt for the browser in low-poly 3D: Claude Opus 5.5 translated the original Mac game's decompiled code function by function.

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A free multiplayer meme game in the browser: drive, boost and fly a sports car through stunt courses, highways and a neon city. The developer says Codex with the model Astra did most of the work, and Claude Code polished the graphics.

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A free pixel-art idle survival game in a French valley overrun by the dead: pick what your survivor does and they keep at it while the game is closed. The developer says Claude Code wrote most of the code.

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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.

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A free cozy boba café game in the browser: a short rush of orders, a calm evening of decorating, and one last customer each night with a story. The developer says Claude produced all the code.

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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.

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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.

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First-person multiplayer space dogfighting in the browser, and Vibe Jam 2026's “Best Art Direction” winner.

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A multiplayer racing sim for a shared screen, where each player's phone becomes a tilt-to-steer controller with haptic and sound feedback.

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A SimTower-style tower builder rebuilt around democratic socialism: you are the elected steward, and confidence is the score.

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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.

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A cockpit space dogfighter in the browser, with a mission campaign and voice-chat multiplayer.

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A strategy game played from the alien side: grow a living colony across the moon while human machines try to burn it out.

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Guide crude oil through a real refinery, from pump jack to tanker, in a short educational browser game by a chemical engineer.

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A browser tycoon about running a vibe-coding studio: pick models and stacks, ship AI-made projects and survive bugs and hype.

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A fake hacker desktop in the browser: scan for other players, break into their systems and take their VibeCoin.

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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.

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