Make a 3D game with AI (free)
Short answer: yes, people have used Gemini 4 Hydrogen to write playable 3D and browser games, including on the official free tier. The usual path is Google AI Studio or Antigravity: describe the game, open the HTML or engine project it writes, then fix what breaks. Times such as “under a minute” or “$0.41” are the authors’ figures, not a test by this site.
Unofficial guide. Not affiliated with Google. Times, costs and results below are the authors’ own claims unless we say otherwise. We have not independently replayed these demos.
What “make a 3D game with AI” usually means here
In public Hydrogen posts, it usually means the model writes code — often a single Three.js or HTML file, sometimes a Godot or Defold project — that you can play in a browser or an engine. It is not a hosted game studio, and it does not replace art pipelines for a shipped title.
What people built
Public posts, linked to the original. Figures are the authors’.
Sahil Panhotra (@SahilPanhotra) · X
Pixel-art side-scrolling shooter, one HTML file
The author says one prompt to Hydrogen produced a playable pixel-art side-scrolling shooter as a single HTML file with no frameworks, in under a minute, and shared a gameplay clip.
@shenghouxuyao · X
Penguin-on-a-bike mini game
Asked Hydrogen for a penguin-riding-a-bicycle scene and shared a recording of an interactive result with aurora and a day/night switch. The author says it took 1 minute 5 seconds on the base reasoning level.
@SidraMiconi · X
Playable map of an FAA ground stop
Built a playable map of that day’s FAA air-traffic disruption. The author says Hydrogen made it from one prompt in 222 seconds for about $0.41, with one label fixed by hand.
Andrey Kucherenko (@a_kucherenko) · X
Apex Lap: a 3D racing game in three rounds
On the author’s ololo platform, Hydrogen built a 3D racing game in three rounds. The author says the game works, and that AI judges reading the code flagged an unimplemented feature mentioned in a comment and growing use of unnamed numbers.
3D snake game in Defold
A small 3D snake game on a tiny planet, built in the Defold engine with Gemini 4 Hydrogen. The post is a clip; we have not played a public build.
Ilia Grigorev (@IliaGrigorevDev) · X
3D Sokoban in Godot 4
The author generated a 3D Sokoban game for Godot 4 with procedural PBR models, animations and seven levels by pairing Hydrogen with their scad-gltf tool.
A prompt an author actually posted
The prompt below is a 2D platformer, not 3D. It is included because the author publicly shared it and ran it with Hydrogen in the Gemini app. For 3D, start in AI Studio or Antigravity and say you want a playable Three.js or engine project; then iterate.
How to do it with Hydrogen
Google documents three practical doors. This site has not timed them for these tasks.
Google AI Studio
Sign in with a Google account, choose gemini-4-hydrogen, and paste a prompt (and, where the task needs it, an image or video). Google’s pricing page lists Free Tier input and output as “Free of charge.” Paid use is $1.50 / $7.50 per 1M input/output tokens.
Gemini app
Google says free Gemini app users “will get access to Gemini 4 Hydrogen via auto model selection when it’s the appropriate model for the prompt.” You do not pick the model yourself.
Google Antigravity
Useful when the job is a multi-file project (a game, a Remotion repo, a Three.js app). Antigravity’s models page, checked 14 Nov 2026, lists Hydrogen on the Free & Plus plan; the $0 Individual plan has “basic weekly rate limits.” The 12 Nov launch post still described paid Pro and Ultra subscribers — both official wordings are on the free guide.
Source: Google AI Studio / Gemini API docs, checked 14 November 2026 · Source: Google Blog, checked 14 November 2026 · Source: Google Antigravity Docs, checked 14 November 2026 · Source: Google Antigravity, checked 14 November 2026 · Source: Google DeepMind, 12 November 2026
Prompt by V哥来了 (@vincent_ddup) · X
创建一款 2D 平台跳跃游戏，包含奔跑、跳跃、二段跳、移动平台、金币和危险障碍。加入检查点系统、金币计数器，以及抵达后即可结束关卡的终点旗帜。使用方向键或 WASD 实现灵敏顺畅的操作，并加入简单的关卡难度选择功能，或在角色死亡后提供重新开始选项。
The author ran this 2D platformer prompt (which they say is the Grok Build example prompt) in the Gemini app with Hydrogen: 6 minutes and 3 revisions by their count.
Cheaper official models, and specialized tools
List prices below are official vendor pages already cited on this site (retrieved 13 or 14 November 2026). We have not priced third-party apps.
| Option | Official price | When it may fit |
|---|---|---|
| Gemini 4 Hydrogen free tier | Input and output “Free of charge,” rate-limited; free-tier prompts may be used to improve Google’s products | Trying a one-file game, scene, or page in AI Studio |
| Gemini 4 Hydrogen paid | $1.50 input / $7.50 output | When you exceed the free tier or do not want free-tier data use |
| Gemini 3.8 Flash | $0.75 / $3.75 until 31 Dec 2026; $1.50 / $7.50 from 1 Jan 2027. Also on a free tier | Cheaper until the end of 2026; several community posts still preferred Hydrogen’s result on visual/code tasks |
| Claude Sonnet 5.5 | $2 / $10 | A community Three.js robot test judged Sonnet better and more expensive (author figures on the 3D scene page) |
| Claude Opus 5.5 | $4 / $20 | A higher official price; Google did not publish a Hydrogen head-to-head |
| GPT-6.1 Sol | $2 / $10 (≤272K) or $4 / $15 | Another paid alternative; see compare |
Source: Google AI Studio / Gemini API docs, checked 14 November 2026 · Source: Google AI Studio / Gemini API docs, Retrieved 13 November 2026 · Source: Google AI Studio / Gemini API docs, Retrieved 13 November 2026 · Source: Anthropic, Retrieved 13 November 2026 · Source: OpenAI, Retrieved 13 November 2026
Specialized products (AI game makers, floor-plan apps, screenshot-to-code sites, promo-video makers) often sit at the top of these searches. We link to them as alternatives and do not restate their prices here, because we did not re-check those pricing pages for this article.
FAQ
Can AI make a 3D game for free?
You can try. Gemini 4 Hydrogen is on Google’s AI Studio and Gemini API free tier (rate-limited; official input and output are “Free of charge”), and people have posted playable mini-games they say they made with it. That is not the same as a polished commercial game, and we have not independently replayed the clips.
Do I need a special AI game maker?
No, if you are willing to work in a chat or an agent editor and then open the files the model writes (often a single HTML/Three.js file, sometimes Godot or Defold). Dedicated AI game makers are a different product: they wrap an engine and usually sit at the top of this search. We have not compared quality against them.
Will the game actually work?
Sometimes, with iteration. One author had AI judges read a Hydrogen-built racing game and they flagged an unimplemented feature and magic numbers, even though the game ran. Treat the first output as a draft.
Our original test of this task
Same prompt on Hydrogen, 3.8 Flash, and Gemma 4, with playable output where the model returned HTML. Harbor Cat Courier (2D pixel-art game) · Pier Dash (playable Three.js 3D game) · All original tests
Related AI floor plan from video AI 3D scene generator Screenshot to HTML AI promo video from code Use Hydrogen free Same prompt, side by side Compare & pricing