Void Explorer
Fly from orbit down to a planet's surface — an OpenAI demo game built in Codex.
Official site void-explorer.openai.chatgpt.site, verified Nov 3, 2026. Linked as "Try it live" from the game's page on OpenAI's official developer showcase.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Void Explorer
A procedural space exploration game in the browser: fly between star systems, enter a planet's atmosphere, land, walk around and take off again. OpenAI's developer blog says it has 2,048 star systems and more than 10,000 procedurally generated planets. The post says the game was built in Codex with the Astra model, which proposed the stack and wrote and changed the code and tests while the author gave direction and reviewed the result. It is a first-party OpenAI demo, credited on OpenAI's showcase to Thomas Ricouard, and is free to play in the browser.
How it was built
Partially verifiedBuilt in Codex with the Astra model (named "GPT-6 Astra" on OpenAI's showcase page). Per the blog post, Astra proposed the stack (TypeScript, Vite, Three.js), later recommended moving the renderer from WebGL2 to Three.js's WebGPU architecture, and wrote and changed the code and the Vitest and Playwright tests; image generation was used for concept art.
- OfficialOpenAI developer blog: the author says they used Astra in Codex to build Void Explorer. — OpenAI Developers
- OfficialOpenAI showcase page credits the game to Thomas Ricouard, OpenAI, and names GPT-6 Astra; it does not mention Codex. — OpenAI Developers
Experience-first: generated concept art set the visual direction, then the coding agent proposed the architecture and implemented it, with a debugging loop of reproduce, inspect screenshots and state, change, and re-run tests. Per the post, Astra also built the ship model in Blender from approved concept references.
- Engine / framework
- Three.js
- Languages
- TypeScript
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“I've been using it in Codex to build Void Explorer, a space exploration game where you can travel from distant stars down to alien landscapes.”Verification notes: Tool, model and build details checked in OpenAI's developer blog post; creator credit and play link checked on OpenAI's showcase page. The blog post shows no author name or date on the page we fetched; the September 2026 date comes only from a search-indexed localized copy. The game itself (client-side 3D) could not be run from our environment; only the page title loaded. Not to be confused with the unrelated 2025 idle game of the same name by Antoine Fauville.
Reported popularity
Popularity labels are only shown with a source. Press reports describe attention; they are not player counts.
- Trending
dev.by reported on OpenAI's guide to building games with GPT-6 Astra, which uses Void Explorer, a browser space game, as its worked example.
Trending: Rising attention: a documented press report, or a high trend score from observed signals (sample values in this prototype).
Development history
- September 2026
OpenAI's developer blog publishes "Building games with Astra", featuring Void Explorer (date seen only in a search-indexed localized copy, given there as 4 September 2026).
UnverifiedOpenAI Developers
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Browser (official site)
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Prototype: your vote is kept only in this browser and is not counted anywhere.
No player reviews yet.
Prototype: reviews are stored in your browser only and are not published or sent to a server. Reviews are shown in the language they were written in.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Building games with Astra OpenAI Developers | Devlog | Not confirmed | Nov 3, 2026 |
| Void Explorer (showcase) OpenAI Developers | Official site | Not confirmed | Nov 3, 2026 |
| OpenAI выпустила гайд по созданию игр с помощью GPT-6 Astra dev.by · ru | Press | Sep 15, 2026 | Nov 3, 2026 |
| Official game page (language check) OpenAI | Official site | Not confirmed | Nov 3, 2026 |
