To get a more useful AI-generated game, describe what the player does, what they are trying to achieve, and how the game responds—not just its genre or theme. Specify controls, rules, scope, visual style, and the first deliverable. Then play or inspect the result and ask for one concrete change at a time.
What to include in an AI game prompt
Treat the prompt as a compact game brief. A tool can make more informed choices when you define the intended experience and the boundaries of the task. These are practical recommendations based on product documentation, not a guarantee that any prompt will produce a finished or high-quality game.
Player goal and core loop
State what the player is trying to do and the repeated action that moves them toward that goal. For example: collect keys, avoid a moving obstacle, unlock a door, then choose the next route. A genre label such as “platformer” does not say what makes the game playable.
Controls and rules
Describe the inputs and what each one does. Include the rules that determine progress: scoring, health or lives, collisions, rewards, and win or lose conditions. Specify the response you expect from an action—for instance, whether a jump can be repeated in midair or whether an enemy resets after a collision.
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Scope and first deliverable
Keep the first request small enough to evaluate. Name a prototype, one level, or one mechanic, and say what the tool should build first. For a complex game, divide the work into separate requests rather than asking for every system, level, and asset at once.
Appearance and platform
Describe the visual style, palette, perspective, mood, camera, and screen format when they matter. Include the platform, engine, or audience if the tool needs that context. You can also describe sound direction, but keep it distinct from the core gameplay requirements.
Turn a vague idea into playable instructions
Compare “Make a fun platformer” with a brief that explains a small, testable experience:
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Create a side-scrolling platform game for desktop. The player must collect three keys and reach the exit. Use arrow keys to move and Space to jump. A collision with a roaming enemy removes one heart; the player starts with three hearts and loses the level at zero. Place the keys along a single short route, with one moving obstacle between the second key and the exit. Use a bright, simple pixel-art style and a fixed side view. Keep the scope to one level. First build the player movement, one enemy, the keys, and the exit; then tell me what assumptions you made and what I should test.
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This example narrows the task by defining the goal, actions, rules, level scope, and look. Change those details to fit your game; there is no universal prompt that guarantees a particular result.
Use a prompt template for a first build
Fill in the details that matter to your idea, and remove requirements that do not:
Create a [genre/type] game for [platform or audience]. The player’s goal is [goal]. The core loop is: [player action] → [result or reward] → [next decision]. Controls: [input and response]. Rules: [health/lives, collision, scoring, win/lose conditions]. Include [specific level, enemy, obstacle, or progression]. Visual style: [palette, perspective, mood, references]. Audio: [desired sound direction]. Keep the scope to [small prototype / one level / one mechanic]. First build [specific first deliverable]. After generating it, tell me what assumptions you made and what I should test.
Separate instructions from background information when a prompt gets long. Headings such as “Goal,” “Controls,” and “Reference” make it clearer which text is a requirement and which text is context. If a visual target is difficult to describe, provide an example or reference image where the tool supports it. Roblox’s guidance for procedural models recommends clear, well-lit, object-focused PNG references; an isometric or three-quarter view can help when appropriate. See Roblox’s procedural model guidance.
Improve an existing game with focused follow-ups
Once you have a prototype, inspect it and report a specific observation. Describe what you expected, what actually happened, and the one change you want. Avoid rewriting the whole brief for a local problem; that can obscure which behavior needs to change.
When [specific situation] happens, I expected [desired behavior], but the game currently [observed behavior]. Change [specific system/object] so that [testable result]. Leave [unrelated behavior] unchanged.
For an edit inside an existing engine project, identify the exact object, instance name, function, or system. Include its object type and measurable behavior. Roblox’s example, for instance, makes “Make the part move” more actionable by naming the part, specifying a repeated 10-stud movement, and naming TweenService. That is an example of a more specific request, not a measured claim about how much it improves results. See Roblox Assistant documentation.
- Build one slice: Ask for the smallest playable version of the central mechanic.
- Inspect the result: Check whether controls, rules, and the intended goal behave as described.
- Report expected versus actual behavior: Name the situation and the discrepancy.
- Request one testable change: Identify the relevant object or system and say what should remain untouched.
- Check the change: Verify the behavior before moving on to another issue.
Roblox Build’s documentation recommends frequent playtesting and reporting expected versus actual behavior as a general iteration workflow. However, the page currently says Build playtesting is “coming soon and is not yet available in Build,” so that workflow cannot currently be completed inside Build itself. See Roblox Build documentation.
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Choose prompting details to match the tool
Different products work on different parts of game creation. Match your request to the tool’s documented output instead of assuming every AI game tool can build a complete game from one prompt.
| Tool | Good fit | Prompting emphasis | Limits and access notes |
|---|---|---|---|
| Roblox Build | Quickly describing and refining simpler Roblox games. | Explain gameplay, player actions, and appearance; make follow-up changes one at a time. | Documentation describes a focus on 2D and 2.5D, with simpler formats such as clickers, arcade games, collect-and-score games, side-scrollers, and puzzles. The page says playtesting is not yet available in Build. Its rollout is gradual, starting with New Zealand; access depends on region and account eligibility, including being at least 9 and completing an account age check. Prompt allowances and credit terms are described on the Build page and may change. |
| Roblox Assistant in Studio | Editing objects, mechanics, or procedural models in an existing Roblox project. | Name the instance and object type, specify the intended behavior, and identify the selected object when relevant. For models, describe editable parameters. | Examples may take several tries, and model generation may take longer than text. See Assistant guidance and procedural model guidance. |
| Unity AI | Generating assets or getting coding assistance within Unity. | Describe the intended asset or coding task; provide reference input when it would clarify the desired result. | The cited Unity 6.5 documentation describes generators for sprites, textures, materials, sounds, animations, and terrain layers, as well as an Editor coding assistant and Sentis for runtime inference. It does not describe a one-prompt complete-game generator. See Unity AI documentation. |
Before choosing a workflow, consider the output you need (a prototype, mechanic, asset, or code), the engine and platform, the scope and dimensionality of the game, how much object-level control you need, how you will review the result, and whether access or credit limits apply. The cited documentation does not establish that one of these tools produces higher-quality games than the others.
Quick Recap
Prompt checklist
- Have I described the player’s goal and the actions that make up the core loop?
- Are controls, rules, and win or lose conditions clear?
- Have I specified a realistic scope and a concrete first deliverable?
- Have I included the visual style, platform, or engine context the tool needs?
- For an edit, have I named the exact object or system and described a testable result?
- Can I inspect or play the output and report what happened, rather than simply asking the tool to make it “better”?
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