Free Games Made with Codex

A free wuxia survivors-like roguelite whose solo developer says most of the code came from Codex and Claude Code.

Download required

Shopping-cart racing at rocket speed through a haunted supermarket — second place at Vibe Jam 2026.

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Grow, prune and shape a living bonsai tree in a calm 3D garden 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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An open-source ASCII life sim where you age, marry, run a business and play on as your heirs.

Download required

A dark-comedy household management game on a fake retro family computer: feed the family, chase reward points, outrun the debt.

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A three-lap browser kart racer against six rivals, coded by Claude in Claude Code.

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A short 2D platformer demo built with Codex CLI and no hand-written code.

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A cute, funny life-sim card game: draw picture cards instead of spinning a wheel, and choose how your life goes.

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A Chinese-language mobile survival game: build up a shelter camp by day and defend it at night for 100 days.

Mobile app

Steer a paper airplane through procedurally generated rooms, an OpenAI Codex showcase demo.

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Care for a cat and merge materials into beds and toys for a small cottage.

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A side-scrolling pixel bullet hell whose code was generated by Codex.

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A browser platformer built in one evening inside an OpenAI Codex session.

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A small turn-based auto-battler in the browser, built by GPT 5.5 in Codex.

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A free online PvP deckbuilder where you trade cards for coins mid-match.

Download required

The Raccoon Heist prompt, rebuilt by OpenAI Codex.

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A browser simulation game whose code was largely written with AI tools such as Claude Code and Codex.

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A short vertical-scrolling shmup whose code, art and music were made by Claude and Codex.

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id Software's Quake, ported to JavaScript and Three.js with Claude Code.

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A Flappy Bird-style Game Boy Color game built with OpenAI's Codex.

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A roguelike deckbuilder where cards fight for territory on a hexagonal grid.

Download required

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 free feudal sci-fi sandbox strategy RPG for the browser: lead a minor noble house across a living campaign map and fight real-time squad battles. The developer says Claude Code writes the code.

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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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A third-person tactical shooter: lead a three-person squad through a rainforest facility to save the last archive before the machines arrive.

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A swipe-to-swing physics game: knock the blocks out of a torch-lit tower without letting the head fall.

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One torch and your shadow: move the light to cast a path, then send your shadow on ahead.

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Steer a swarm of thousands of argon atoms after your cursor and absorb every other noble gas in the chamber.

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Help little demon PIP run a Halloween costume shop in a human town, matching costumes to customers' clues, in English or Traditional Chinese. The developer says Claude wrote the code and tests.

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A turn-based Halloween stealth puzzle: lure the homeowners away, take every candy bowl and get back to the gate.

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A cozy falling-sand factory game: an exiled alchemist digs, sorts and transmutes soil into gold, then builds machines to do it.

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A one-minute phone game about stamping five approvals on a fictional request form, each tilted in a bow toward the president. The developer says the code was written with OpenAI Codex and Claude Code.

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A torch-and-mirror puzzle in the browser: rotate mirrors, wake every lantern and bring the signal home across three boards.

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A free visual novel set in Lyr, a city where souls are sold as a product, about an inventor whose device makes people kind.

Download required

A 3D survival-horror expedition through torchlit catacombs with no combat: when your flame dies, the Hunter starts searching for you.

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Drag matching pieces together to craft items, then sell them or keep the treasures in your own collection room.

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Heat the metal, strike at the right instant, and forge five bells for one final chord.

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A top-down action game where your torch is shelter, bait and weapon: throw it, leave it burning, then recall it through the shadows.

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A one-finger, portrait loot roguelite for phones: a delivery robot works the night shift in a closed shop; a beginner developer directed mainly Claude Code, starting from an existing codebase.

Mobile app

A free first-person team spellcasting battle in the browser: three orders of mages guard their shrines and try to break the others'. The developer says Claude Code writes almost all of the code.

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A short 3D action prototype in a ruined sky temple, made in one day by Codex as a test of building a Unity game from natural-language instructions.

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Slingshot a shopping trolley across a car park and stop it dead centre in the trolley bay.

Mobile app

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 3D browser roguelite: a small brass machine with a sword, a gun and a laser cuts its way out of a castle-machine.

No download needed

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 free browser physics merge game with original creatures and cross-species fusion recipes; the developer says it was made entirely with Codex over a weekend, logo and sound effects included.

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Clay cavemen fight, gather resources and race to haul them back to their caves first.

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A traditional ASCII roguelike with a long quest line, a large world map and old-school D&D-style races, classes and spells.

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