FrancoStino/unity-ai-game-creator

Unity AI Game Creator

Overview

This skill transforms a raw game concept into a fully structured Unity development plan with AI-generated assets, scenes, music, scripts, and deployment-ready builds. It guides the agent through a 5-phase pipeline — from extracting core game dimensions to producing ready-to-use AI prompts for every asset category — using the latest Unity 6+ features and AI tooling ecosystem. Unlike generic Unity reference skills, this skill is workflow-driven: the user provides an idea, and the agent delivers a complete, actionable game development roadmap.

When to Use This Skill

• Use when a user describes a game idea and wants a complete development plan
• Use when generating AI prompts for 3D models, textures, music, sound effects, or UI assets
• Use when setting up a new Unity project from scratch with modern architecture
• Use when creating Scene Blueprints from a concept description
• Use when building a Game Design Document (GDD) from a rough idea
• Use when leveraging Unity AI Assistant, MCP server, or external AI tools in a game workflow
• Use when planning monetization, performance budgets, or app store deployment

How It Works

Master Pipeline

Execute these phases in order. Each phase produces concrete deliverables before advancing.

PHASE 1: IDEATION ──▶ PHASE 2: BLUEPRINT ──▶ PHASE 3: GENERATION ──▶ PHASE 4: ASSEMBLY ──▶ PHASE 5: DEPLOYMENT
  Game Brief            GDD + Scenes           AI Prompts + Assets     Project Setup          Build + Store
  Genre Analysis        Architecture           Scripts + Audio         Core Systems           QA + Submit
  Scope Assessment      Scene Blueprints       Voice + UI              Polish + Juice         Analytics

Phase 1: Ideation & Deep Analysis

Extract and clarify these dimensions from the user's game idea. Ask only for what is ambiguous — infer the rest from context.

| Dimension | What to Extract | If Unclear | |-----------|----------------|------------| | Genre | Primary + secondary genre blend | Suggest 3 genre combinations | | Platform | Mobile, PC, Console, WebGL, VR/AR | Recommend based on scope | | Perspective | 2D, 2.5D, 3D, Top-down, Side-scroll, FPS, TPS | Infer from genre | | Art Style | Realistic, Stylized, Pixel, Low-poly, Anime, Painterly | Suggest 3 options | | Core Loop | The 30-second repeating gameplay action | Identify from description | | Target Audience | Age range, gamer profile, platform habits | Recommend based on genre | | Session Length | Average play session duration | Infer from platform + genre | | Monetization | Free-to-play, Premium, Hybrid | Recommend based on platform | | Scope | Solo dev, small team, studio | Ask if not obvious | | Timeline | MVP in weeks, full release target | Suggest realistic milestones |

Also provide:

1. Top 3 Reference Games — What they do well, what the user can learn
2. Market Gap — What opportunity exists that competitors miss
3. Core Differentiator — The one unique thing about this game
4. Risk Assessment — Technical and market risks with mitigations

Scope Calibration:

| Scope | Timeline | Team Size | Feature Budget | |-------|----------|-----------|----------------| | Prototype | 1–2 weeks | Solo | Core loop only | | Vertical Slice | 4–6 weeks | Solo–2 | 1 complete level + polish | | MVP | 8–12 weeks | 2–4 | 3–5 levels + save + UI | | Full Release | 16–24+ weeks | 3–8 | Complete content + multiplayer |

Phase 2: Blueprint & Design

Game Design Document (GDD)

Generate a structured GDD covering:

1. Executive Summary — Elevator pitch, genre, USPs
2. Gameplay — Core loop diagram, progression, abilities, win/loss, difficulty curve
3. World & Narrative — Setting, characters, level structure
4. Art Direction — Visual style, color palette (hex codes), reference descriptions, UI/UX style
5. Audio Direction — Music style per scene, SFX categories, voice needs
6. Technical Spec — Unity version, render pipeline, performance budgets, SDKs
7. Monetization Strategy — Revenue model, IAP design, ad placement
8. Development Roadmap — Phases, milestones, feature priority matrix, risk register

Scene Blueprints

For each scene, produce a hierarchy covering:

• Environment — Ground/terrain, skybox, lighting setup, props with positions
• Interactive Objects — Behavior on interaction
• Characters / NPCs — AI behavior, patrol paths, dialogue triggers
• UI Overlay — HUD elements, contextual prompts
• Audio Layers — Background music (mood, tempo, loop point), ambient SFX, trigger SFX
• Camera Setup — Type (Cinemachine/Fixed/Follow), behavior configuration
• Systems Active — Save checkpoints, spawners, particle effects

Architecture Blueprint

Provide recommended project folder structure:

Assets/_Project/
├── Scripts/ (Core, Gameplay, UI, Data, Audio, Utilities)
├── Prefabs/ (Characters, Environment, UI, VFX)
├── Scenes/
├── Art/ (Models, Textures, Materials, Animations, UI_Assets)
├── Audio/ (Music, SFX, Ambience)
├── ScriptableObjects/
└── Resources/

Phase 3: AI-Powered Asset Generation

For every asset category, provide ready-to-use prompts for the best current AI tools.

3D Model Prompts

Recommend tools dynamically (Meshy.ai, Tripo3D, Rodin, Unity AI Assistant) and generate prompts including:

• Asset name, art style, gameplay purpose
• Polygon budget, texture resolution, PBR maps needed
• Animation-ready flag, scale reference
• Unity import settings (scale factor, normals, animation type, material handling)

Texture & 2D Asset Prompts

Recommend tools (Leonardo.ai, Midjourney, DALL·E, Unity AI Assistant) and generate prompts including:

• Texture type (seamless tile, sprite, UI element, concept art)
• Resolution, style, tiling requirements, PBR maps
• Unity import settings (texture type, filter mode, compression, max size)

Music Prompts

Recommend tools (Suno, Soundraw, Sonauto) and generate prompts including:

• Track name, scene context, mood, tempo (BPM), duration
• Instruments, reference tracks, loop points, dynamic layers
• Unity import settings (format, load type, compression, loop config)

Sound Effects Prompts

Recommend tools (ElevenLabs, OptimizerAI/SFX Engine) and generate prompts including:

• SFX name, category, gameplay context, duration
• Variation count, characteristics
• Unity import settings (format, load type, 3D sound config, variation arrays)

Voice & Narration Prompts

Recommend tools (ElevenLabs, Play.ht, Coqui) and generate prompts including:

• Character name, voice profile, dialogue line, emotion, context

UI/UX Asset Prompts

Generate specifications for Unity UI Toolkit or AI image generation including:

• Element name, screen context, visual style
• States (normal, hover, pressed, disabled)
• Dimensions, anchor behavior, animation descriptions

Phase 4: Assembly & Development

Project Initialization Checklist

• Unity version (recommend latest Unity 6 LTS)
• Render pipeline (URP for mobile/stylized, HDRP for high-fidelity, Built-in for 2D)
• Build settings, player settings (color space, scripting backend, API compatibility)
• Essential packages (Input System, Cinemachine, TextMeshPro, Addressables, Unity AI Assistant)
• Git LFS configuration for large assets

Development Order (Week-by-Week)

1. Foundation — Project setup, GameManager, event system, scene management, input config
2. Core Gameplay — Player controller, camera, core loop, basic enemies
3. Content & Systems — Level building, UI system, audio manager, save/load
4. Polish & Feedback — VFX/juice, progression, tutorial, settings
5. Platform & Release — Profiling, monetization, analytics, platform polish, submission

Script Architecture Patterns

• GameManager → Singleton or Service Locator
• Events → Observer Pattern (C# events + ScriptableObject Events)
• Save System → JSON serialization + encryption
• Object Pooling → Generic pool for bullets, enemies, VFX
• State Machine → Player states, game states, enemy AI
• Audio → Singleton with Audio Mixer Groups
• UI → UI Toolkit with MVVM or event binding
• Scene Loading → Addressables + async with progress
• Input → New Input System with Action Maps

Unity AI Assistant & MCP Integration

• Setup steps for Unity AI Assistant (Unity 6.3+)
• MCP server configuration for external IDE/agent control
• Example in-editor prompts for scene manipulation, scripting, profiling

Phase 5: Quality & Deployment

Performance Budgets

| | Mobile | PC | Console | |--------------------|-----------|-----------|-----------| | Target FPS | 30/60 | 60/120 | 60 | | Draw Calls | < 100 | < 500 | < 300 | | Triangles/frame | < 100K | < 2M | < 1M | | Texture Memory | < 150MB | < 1GB | < 512MB | | Build Size | < 150MB | < 2GB | < 4GB |

Testing Checklist

Core loop stability, UI responsiveness, save/load persistence, audio balance, memory leak checks, frame rate stability, input device coverage, edge cases (low battery, interruptions), accessibility, localization.

Store Submission Guide

App icon, feature graphic, screenshots, promotional video, descriptions, keywords, privacy policy, age rating, content rating — with AI prompts for generating marketing assets.

Examples

Example 1: Cozy Farming Game

User: "I want to make a cozy farming game with magic elements for mobile"

Agent delivers:

1. Game Brief — Cozy farm sim × magical creatures, mobile portrait, stylized low-poly, 5-min sessions, F2P with cosmetic IAP
2. 3 Reference Games — Stardew Valley (loop), Merge Magic (mobile UX), Moonstone Island (magic farm blend)
3. Core Loop — Plant → Tend → Harvest → Sell → Upgrade → Discover magical seeds
4. Scene Blueprints — Farm (main), Village Market, Enchanted Forest, Player Home
5. AI Asset Kit — 15 crop models, 8 building models, 5 character models, seasonal music tracks, ambient farm SFX, UI kit
6. Technical Plan — Unity 6 LTS + URP, mobile-first 30fps, addressable assets for seasonal updates
7. 6-Week Roadmap — Foundation → Core Gameplay → Content → Monetization → Polish → Soft Launch

Example 2: Multiplayer Shooter

User: "Make a fast-paced arena shooter for PC with neon visuals"

Agent delivers:

1. Game Brief — Arena FPS, PC/Steam, stylized neon cyberpunk, 10-min matches, Premium $9.99
2. Core Loop — Spawn → Loot → Fight → Eliminate → Score → Respawn
3. Technical Plan — Unity 6 + HDRP, Netcode for GameObjects, dedicated servers, 120fps target
4. AI Asset Kit — Arena models, weapon models, neon material/shader prompts, electronic music tracks, weapon SFX

Example 3: 2D Puzzle Mobile

User: "Simple puzzle game like Wordle but with colors"

Agent delivers:

1. Game Brief — Casual puzzle, mobile portrait, flat minimalist, 2-min sessions, F2P with rewarded ads
2. Scope — Prototype in 1 week, MVP in 3 weeks
3. Scene Blueprints — Main Menu, Game Board, Results Screen, Daily Challenge
4. AI Asset Kit — UI sprites, celebration particles, calm ambient music, tap/swipe SFX

Best Practices

• ✅ Start with the core loop — Nail the 30-second cycle before anything else
• ✅ Profile before optimizing — Use Unity Profiler to find real bottlenecks
• ✅ Use ScriptableObjects for data — Decouple data from logic for flexibility
• ✅ Generate multiple AI asset variations — Pick the best from 3–5 generations
• ✅ Test on real devices early — Emulators miss platform-specific issues
• ✅ Version control from day one — Git + LFS, commit often
• ❌ Don't hardcode tool choices — Always present alternatives to the user
• ❌ Don't skip the GDD — Even solo projects benefit from written design
• ❌ Don't optimize prematurely — Make it work, make it right, make it fast
• ❌ Don't ship AI assets without review — Check licensing terms for each tool

Limitations

• This skill does not replace environment-specific validation, testing, or expert review.
• AI-generated assets require legal review for commercial usage rights per each tool's Terms of Service.
• Performance budgets are guidelines — always profile on actual target hardware.
• AI tools and their capabilities evolve rapidly — verify current availability and pricing before recommending.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

Security & Safety Notes

• This skill does not include shell commands, network fetches, or credential handling.
• All AI tool recommendations are external services; the skill does not execute API calls or store tokens.
• Asset generation prompts are text-only guidance — no automated downloads or file mutations occur.

Common Pitfalls

• Problem: User provides a vague idea like "make a game" Solution: Ask 2–3 targeted questions (genre, platform, scope) before generating the first draft

• Problem: Scope creep — trying to build everything at once Solution: Use the scope calibration table and feature priority matrix (Must/Should/Could/Won't)

• Problem: AI-generated assets don't match the art style Solution: Always include the GDD's art direction keywords in every asset prompt for consistency

• Problem: Performance issues on target platform Solution: Set platform-specific budgets early and profile against them weekly

Related Skills

• @unity-developer - For deep Unity technical reference without the idea-to-game pipeline
• @game-development - For the game development orchestrator that routes to platform-specific skills
• @unity-ecs-patterns - For Entity Component System architecture patterns specifically
• @bevy-ecs-expert - When building with Bevy/Rust instead of Unity