
Void Explorer
Simulation · AdventureFly from orbit down to a planet's surface — an OpenAI demo game built in Codex.
Plays instantly in the browser
Play free — official siteVibeGameDB lists 6 games in this group, 6% of the 100 games on the Codex page. Each one has a source for how it was made. The most common engine is Three.js (83%). 5 are free or free to play and 0 are paid; 6 can be played in a browser. The most recently added is Flying Car Simulator (November 2026).
Ordered by editorial score, then player rating, then release date. Open a game for its sources.

Fly from orbit down to a planet's surface — an OpenAI demo game built in Codex.
Plays instantly in the browser
Play free — official site
Steer a paper airplane through procedurally generated rooms, an OpenAI Codex showcase demo.
Plays instantly in the browser
Play free — official site
Fast drone combat in escalating waves, with boss waves, missions and a hangar of permanent upgrades between runs.
Plays instantly in the browser
Play free — official site
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.
Plays instantly in the browser
Play free — official site
A free browser prototype: drive a red roadster through rush-hour traffic and use its jets to hop over oncoming cars; the developer says it was made with Codex, chatting and revising along the way.
No download needed
View demo on Browser
A Descent-style ship crawler with stealth and roguelike levels, deep inside a hostile asteroid.
Plays instantly in the browser
Play free — official site