Write prompts around the output you want: an explorable world, a basic playable game, a change to an existing project, or an individual asset. Then specify the gameplay or behavior, the important details and limits, and how you will check the result. There is no single prompt template that works equally well across these different tools.
First choose what you want the generator to make
“AI game generator” can mean several different things. Google DeepMind’s experimental Project Genie creates an explorable generated world. Roblox Build turns natural-language descriptions into a basic playable game starting point. Roblox Studio Assistant works within an existing project to help edit objects, scripts, or assets. The best prompt depends on which output you need.
| Tool type | What to describe | Useful iteration |
|---|---|---|
| World generator, such as Project Genie | Environment, character, movement, interaction with the world, and mood | Inspect and modify the world sketch or preview; try text or image input and remixing where supported |
| Game generator, such as Roblox Build | Game form, core loop, controls, challenge, presentation, and goal | Ask for one concrete change after generation |
| Project assistant, such as Roblox Studio Assistant | The named object or project area, desired behavior, trigger, constraints, and test | Plan, implement a small change, playtest, and refine |
| Asset or procedural-model generator | The object’s shape, materials, distinguishing features, and properties that should remain editable | Use a clear reference image when supported and revise specific properties |
These tools differ in their inputs, controls, and supported scope; the cited documentation does not establish one as best for every creator.
For a playable game, prompt for the loop and the win condition
Start with what the player repeatedly does, what changes in response, and what counts as success. Roblox Creator Hub says, “The best results come from clear, specific descriptions.” Its examples include tapping to collect coins and buy upgrades, and dodging obstacles while collecting power-ups.
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- Game form: Name a manageable form, such as a clicker, arcade dodger, collect-and-score game, side-scroller, or puzzle.
- Player action and controls: State what the player can do and what input triggers it.
- Progress and challenge: Explain what the player collects, avoids, unlocks, or completes.
- Goal: Give a level endpoint, score target, or other clear win condition.
- Presentation: Add a setting and visual style; request sound only if the tool supports it.
- Initial scope: Ask for a small first playable slice rather than a large game with many systems.
For example, this adaptable prompt is specific without requiring a large first build: “Make a 2D side-scrolling game about a courier crossing a rainy city. The player moves left and right and jumps over puddles and barriers, collecting three parcels per level. Show the parcel count and a finish gate. Use a bright comic-book look with high-contrast silhouettes. Start with one short level.” This is an illustration, not a tested prompt or promised result.
Roblox Build’s current documentation describes a mobile-first tool focused on 2D and 2.5D games, with simpler game types working best. If your idea depends on a complex 3D world or many interlocking systems, reduce it to a small playable core or choose a workflow designed for the project you have in mind.
For an explorable world, describe the place and the character separately
Google DeepMind’s Genie guide recommends giving the environment and character distinct descriptions, then explaining how movement affects the surroundings. Include details that the tool can represent, rather than relying on a pile of mood words.
- Environment: Identify the terrain, surfaces, visual style, lighting, structures, objects, weather, and visible motion.
- Character: Describe appearance or identity, capabilities, and movement.
- Interaction: Say what changes when the character moves or acts, such as tracks in sand, cut grass, splashes, or movable objects.
- Mood: Use sensory cues such as light, sound, texture, and atmosphere.
For example: “Environment: A compact island with black volcanic sand, wind-bent palms, and a ruined lighthouse at the north end. Dawn light and low sea mist. Waves push loose driftwood across the beach. Character: A small brass diving robot that walks slowly and leaves wet footprints. It can pick up driftwood and place it beside the lighthouse.” This example applies the documented prompt dimensions; it is not a tested result.
Genie’s guide advises, “Keep your descriptions to-the-point. Short declarative sentences work well.” Where the interface supports a world sketch or preview, inspect it and change one or two details at a time. The guide also describes text and image prompts, image uploads, sketch modification, and remixing prior worlds. It says Gemini can help rewrite, expand, or elaborate descriptions, but the final prompt should still match the generator’s inputs.
For an existing project, identify the object and bound the change
An assistant editing a project needs context that a standalone generator does not. Use the project’s object names where possible, state the behavior you want, specify its trigger and boundaries, and ask how to verify it. Roblox’s Assistant tutorial notes, “There is more than one right way to make any particular request, but every word counts.”
Example: “On the part named CheckpointPad, add behavior so touching it saves the player’s current checkpoint. Do not change the part’s size or material. Show a short confirmation message when the checkpoint is saved. Tell me which script you changed and what I should test in play mode.” This is an example of a clear request, not a guarantee that an assistant will implement it correctly.
For a larger feature, ask for a plan first, then implement and test one small step before continuing. Roblox’s Assistant development guidance frames the workflow as Plan, Build, Playtest, Refine, with the core world and gameplay ahead of secondary systems.
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For a generated asset, describe the object and its editable properties
When prompting for a model, focus on the object itself rather than unrelated background. Specify its important shape, material, color, age, and distinguishing features. If the result should be adjustable, name the properties that must remain editable and explain how parts should respond when their scale or count changes.
Roblox’s Assistant prompt guide recommends a reference image where supported. Its guidance favors a PNG with good lighting, a clear subject, a simple background, and a useful three-quarter or isometric view when possible.
How to revise a result that is wrong or incomplete
- Identify the mismatch. Is the game loop unclear, the wrong object changed, or a specific detail missing?
- Make a targeted follow-up. Ask for one concrete adjustment, such as “make the coins larger” or “add a timer,” rather than rewriting the entire brief. Roblox Build documents chat-based refinements of this kind.
- Restate boundaries when needed. For a project edit, name the intended object and explicitly say what must not change.
- Reduce the scope. If the request is too ambitious, ask for the smallest playable version first, then add systems in separate steps.
- Inspect and playtest. Check the generated behavior in the project, especially scripts and interactions, before treating them as correct.
- Try a small wording change. Roblox’s prompt guide says, “Many AI tools are non-deterministic, meaning they don’t create the exact same output each time you ask them to do something.” A revised phrase or another generation may produce a different result.
If Roblox Build refuses or reframes a request, its documentation notes that content rules, account age settings, or copyright and intellectual-property restrictions may be involved. Rephrase the idea within those limits rather than trying to bypass them.
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Roblox’s current Build documentation describes a mobile-first tool for simple 2D and 2.5D games. It says a Build game edited in Studio is permanently converted to a standard Studio game, removing Build status for that version. The same documentation describes games as defaulting to an age-16-and-older setting; changing the audience involves Roblox Select review. Check the live Creator Hub guidance before relying on these workflow details, which can change.
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Roblox’s generative-AI policy requires AI integrations to follow Community Standards and provide transparency. If player interactions can trigger AI responses, creators must disclose that in the Content Maturity questionnaire. Extended interactions have additional Restricted-labeling requirements for audiences under 18. Review the policy and applicable platform requirements before publishing.
Project Genie is described by Google DeepMind as an experimental research prototype, not a general-purpose promise of production-ready game output. Its documented prompt workflow includes text or image input, preview-sketch iteration, image upload, and remixing; availability and capabilities should be checked on the current official page.
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