VibeGameDB lists 16 games in this group, 16% of the 100 games on the Codex page. Each one has a source for how it was made. The most common engine is No engine (HTML5) (31%). 15 are free or free to play and 0 are paid; 13 can be played in a browser. The most recently added is The Last Light (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 open-source ASCII life sim where you age, marry, run a business and play on as your heirs.
Download required
View on itch.io
A short 2D platformer demo built with Codex CLI and no hand-written code.
Plays instantly in the browser
Play free — official site
id Software's Quake, ported to JavaScript and Three.js with Claude Code.
Plays instantly in the browser
Play free — official site
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.
Plays instantly in the browser
Play free — official site
A torch-and-mirror puzzle in the browser: rotate mirrors, wake every lantern and bring the signal home across three boards.
Plays instantly in the browser
Play free — itch.ioA 3D survival-horror expedition through torchlit catacombs with no combat: when your flame dies, the Hunter starts searching for you.
Plays instantly in the browser
Play free — itch.io
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
View demo on itch.ioA small 2D side-scrolling souls-like demo in the browser, with grappling, a day-night cycle and a built-in map and body editor. The developer says it is mostly coded with AI agents (Codex and Claude).
No download needed
View demo on Browser
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
A point-and-click browser game made for a wedding website: wander ten illustrated rooms, throw a party and take a road trip; the README says AI agents write all the code.
Plays instantly in the browser
Play free — official site
A free browser arcade of small original games, from a bubble shooter and a brick breaker to a kart racer and artillery duels, playable offline on a phone.
Plays instantly in the browser
Play free — official site
A free, open-source survivors-style roguelite starring a cockroach in the sewers, playable in the browser or as a desktop app. The developers say they built it together with Claude Code, Codex and Copilot, spending most of their own time on design and testing.
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 free, open-source browser poker roguelike that the developer says imitates Balatro's play style and was implemented with Codex.
Plays instantly in the browser
Play free — official site
A free web tribute to the Kingsoft Typing game 生死时速: type an English passage to make a police officer or a thief run faster; vibe-coded with Codex.
Plays instantly in the browser
Play free — official site