Find and play 800+ AI-built browser games in one place
A former Newgrounds kid kept losing track of AI-made games shared on X and Reddit, so he built Playground, a directory of independent browser games made with AI. You can filter by model (GPT-6 Astra, Opus 5.5 and others) and by device, and submit your own.
Source
richleigh on Hacker News · 2026-10-20 · Project link
Written in our own words. Credit to the original author. Link checked 2026-10-22.
What they did
A former Newgrounds kid kept losing track of AI-made games shared on X and Reddit, so he built Playground, a directory of independent browser games made with AI. You can filter by model (GPT-6 Astra, Opus 5.5 and others) and by device, and submit your own.
Result (as claimed)
Over 800 playable games listed; posted to Hacker News.
Tools they used
Cost: Claude Opus 5.5: from $4 in / $20 out per 1M tokens; GPT-6 Astra: from $10 in / $50 out per 1M tokens.
Set it up
Write a one-page brief
Describe the app in plain words: who it is for, the 3 core screens or actions, and what "done" looks like.
Start the project with your agent
Open Claude Opus 5.5 and paste the brief. Ask it to propose a stack and a file plan before writing code.
Build one slice at a time
Ship the smallest working flow first, run it, then add features one by one. Commit after each working step.
Test it like a user
Click through on desktop and phone. Ask the agent to add basic tests and fix anything that breaks.
Check security and ship
Keep keys in environment variables, check auth and database rules, then deploy and share the link.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Find and play 800+ AI-built browser games in one place What the original author did: A former Newgrounds kid kept losing track of AI-made games shared on X and Reddit, so he built Playground, a directory of independent browser games made with AI. You can filter by model (GPT-6 Astra, Opus 5.5 and others) and by device, and submit your own. Reported result (as claimed by the author): Over 800 playable games listed; posted to Hacker News. Source: https://news.ycombinator.com/item?id=50168142 Tools they used: Claude Opus 5.5, GPT-6 Astra Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Find and play 800+ AI-built browser games in one place What the original author did: A former Newgrounds kid kept losing track of AI-made games shared on X and Reddit, so he built Playground, a directory of independent browser games made with AI. You can filter by model (GPT-6 Astra, Opus 5.5 and others) and by device, and submit your own. Reported result (as claimed by the author): Over 800 playable games listed; posted to Hacker News. Source: https://news.ycombinator.com/item?id=50168142 Tools they used: Claude Opus 5.5, GPT-6 Astra Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Find and play 800+ AI-built browser games in one place What the original author did: A former Newgrounds kid kept losing track of AI-made games shared on X and Reddit, so he built Playground, a directory of independent browser games made with AI. You can filter by model (GPT-6 Astra, Opus 5.5 and others) and by device, and submit your own. Reported result (as claimed by the author): Over 800 playable games listed; posted to Hacker News. Source: https://news.ycombinator.com/item?id=50168142 Tools they used: Claude Opus 5.5, GPT-6 Astra Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to make a browser arcade game with AI · How to vibe code a game with AI
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GPT-6 Astra and Opus 5.5, both on High, got the same prompt for a Crossy Road clone. Astra went soft and dreamy with misty trees; Opus went full arcade with chunky colors, trains and trucks.
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