How to Build an Original Game With an AI Coding Agent (Without Copying One)

AI coding agents can now build surprisingly complete games from a single prompt. Many of the most impressive demos have been clones of famous games. That is fun to watch, but it is not something you can safely publish or sell.

Claude Code has reportedly started declining to recreate specific existing games, even when renamed. Here is how to build an original game with an AI coding agent instead, whatever tool you use. For the background, see our main article on the Claude Mythos 5.5 leak.

Why build an original game instead of a clone?

Because an original game is yours to publish, share and sell. A clone of a well-known game can run into copyright and trademark problems, and the tool you use may refuse to help.

This guide is general advice, not legal advice. If you plan to sell a game, it is worth a quick chat with someone who knows intellectual property law where you live.

How do you start with an original idea?

Start with a genre, then add one twist that makes it yours. A simple formula works well: genre plus setting plus one unusual mechanic.

• Genre: block-building sandbox, platformer, puzzle, tower defence, farming sim.
• Setting: floating islands, an underwater city, a busy kitchen, a tiny garden.
• Twist: gravity flips every minute, you build with sound, the map changes with the weather.

You can ask an AI chatbot for 20 ideas using that formula, then pick the one you are most excited about. Ask it to avoid naming existing games or characters in its suggestions.

How do you brief an AI coding agent for an original game?

Give the agent a short design brief rather than a game title to copy. Here is a simple structure you can paste and fill in:

1. One-line pitch: what the game is in a sentence.
2. Core loop: what the player does again and again.
3. Controls: keyboard, mouse or touch, and what each does.
4. Look and feel: style, colours and mood, described in your own words.
5. Must-have features: three to five, no more for version one.
6. Originality rule: “Do not reproduce characters, names, levels, logos or assets from any existing game. Create original designs.”
7. Technical limits: for example, runs in a web browser as a single project.

Being clear that you want something original also tends to give better results. The agent spends its effort on your idea instead of trying to match a game it half-remembers.

How do you build it step by step?

1. Build the core first. Ask for a tiny playable version: one level, the main mechanic, basic controls.
2. Play it yourself. Note what feels wrong in plain language, such as “the jump is too floaty”.
3. Add one feature at a time. Ask for each change separately and test after each one.
4. Keep versions. Save a copy or use version control before each big change so you can roll back.
5. Add your own art and sound. Draw it, commission it, generate it with a tool whose terms allow commercial use, or use properly licensed packs.
6. Ask the agent to review its own work. “List anything in this project that may copy an existing game, and suggest original replacements.”

If you are deciding between coding agents, run the same brief through two of them and compare. Our guide to running a fair side-by-side model test keeps the comparison honest.

What should you check before you publish?

• Name: search app stores and the web to make sure it isn’t already used by another game.
• Characters and creatures: make sure none closely resemble a famous character.
• Levels and maps: check they aren’t recreations of a known level.
• Assets: keep a simple list of every image, sound and font and where it came from, with licence details.
• Store rules: read the platform’s rules on AI-generated content and declare it if they ask.

What mistakes should you avoid?

• Starting with “make Minecraft” or any other title instead of a genre and a twist.
• Asking for everything at once. Huge one-shot builds look great in demos but are hard to fix.
• Using assets you found online without checking the licence.
• Skipping playtesting. AI can write the code, but only people can tell you if it is fun.
• Trying to get round a tool’s rules by disguising a copy. It is not worth the risk.

Frequently asked questions

The bottom line

AI coding agents make it easier than ever to build a game, but the safe and rewarding path is an original one. Start with a genre and a twist, write a clear brief, build in small steps and check your assets before publishing. Your next step: write a one-line pitch for your game idea today and turn it into a design brief.

Related posts

• Claude Mythos 5.5 Leak: Fable 5.5 Demos, GPT-6.2 Astra and This Week’s AI News
• Cheap vs Premium AI Model: How to Run a Fair Side-by-Side Test
• How to Test Unreleased AI Models in Arena Battle Mode

Garry Knight

I'm Garry Knight, the person behind Prodify Digital. I write about email list building, email marketing, SEO, AI search and the tools that connect them. My aim is to make online marketing easier to understand, so creators and small business owners can make informed decisions about building an audience and keeping people engaged. Here you'll find straightforward guides and product reviews that explain what something does, where it fits and which limitations matter. The focus is on clear explanations and useful next steps—not hype, shortcuts or promises of easy earnings.

See Full Bio