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Summer Engine is the AI game engine for building a Summer game. Start in the editor, write gameplay in GDScript, add the Summer SDK capabilities your game needs, then test and publish from one documented path. Describe what you want to build or change in natural language. Summer Engine can work across your scenes, scripts, and assets while you review the changes in the same project. What makes Summer Engine different:
  • One creator path: Install, create, integrate the Summer SDK, test, publish, and update.
  • GDScript by default: Start with the creator language used throughout these guides.
  • Portable source: Your project stays yours. Familiar formats improve portability, but editor-version, import, plugin, native-extension, and export compatibility still need verification.
  • Project Intelligence: AI understands your scenes, scripts, assets, and game logic
  • Reviewable Operations: Changes go through editor APIs; review the diff and test the project after each operation
  • Privacy controls: Pro accounts can enable Privacy Mode to opt out of training-data use

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Start here

Follow this path in order:

1. Install Summer Engine

Install the editor on macOS or Windows and verify it opens.

2. Create a Summer game

Create a project and make GDScript your default gameplay language.

3. Build your first GDScript game

Add the minimal game structure and connect the Summer SDK.

4. Use the Summer SDK

Choose multiplayer, player, persistence, economy, and publishing capabilities.

5. Test locally

Validate the Summer game before using a limited publish request.

6. Export and submit

Export a game-only pack, submit it for human review, and follow the update path.

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Other ways to start

Give the task to an AI coding agent

Use the canonical prompt to build a Summer game with Summer Engine and the Summer SDK.

How do I make a game with Summer Agent?

Use Summer Agent to draft scenes and GDScript, then review and test the generated work.

How do I use the Summer Engine CLI and MCP?

CLI lets Claude Code, Cursor, Devin Desktop install and run Summer Engine. You chat in your IDE; the AI uses MCP tools.

How do I make a PC game with Summer Agent?

Build and export a Windows game with Summer Agent

How do I make a Mac game with Summer Agent?

Build and export a macOS game with Summer Agent

How do I make a web game with Summer Agent?

Create a browser-playable game with Summer Agent

How do I make an iOS game with Summer Agent?

Build and export an iPhone or iPad game with Summer Agent

How do I make an Android game with Summer Agent?

Build and export an Android game with Summer Agent

How do I make a console game with Summer Agent?

Build a Nintendo Switch, PlayStation, or Xbox game with Summer Agent

How do I make a PlayStation game with Summer Agent?

Build and export a PlayStation game with Summer Agent

How do I migrate from Unity to Summer Engine?

Rebuild your Unity project in Summer Engine with Summer Agent

How do I migrate from Unreal to Summer Engine?

Rebuild your Unreal project in Summer Engine with Summer Agent

Bringing an existing Godot project?

Use the compatibility and migration path instead of the new-creator sequence.

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How Do I Make Games with My IDE?

Add Summer Engine to Cursor, Claude Code, Devin Desktop, or your favorite AI-powered editor:

How do I make a game with Cursor?

Add Summer Engine to Cursor. One-click or manual config. Full page.

How do I make a game with Claude Code?

Add Summer Engine to Claude Code. Full setup guide.

How do I make a game with Devin Desktop?

Add Summer Engine to Devin Desktop. Full setup guide.

How do I make a game with Antigravity?

Add Summer Engine to Antigravity. Full setup guide.

How do I make a game with Codex?

Add Summer Engine to Codex. Full setup guide.

How do I make a game with VS Code or GitHub Copilot?

Add Summer Engine to VS Code or Copilot. Full setup guide.

How do I make a game with Zed?

Add Summer Engine to Zed. Full setup guide.

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Learn

Deep dives into Summer Engine’s capabilities:

MCP: Build with Cursor, Claude, Devin Desktop, Antigravity, Codex, VS Code, Zed

How to make games with Summer Engine from your IDE. MCP setup, CLI, API reference.

AI Operations

How Summer Engine modifies your project safely through natural language

Project Intelligence

How AI understands your entire codebase, scenes, and assets

Asset Generation

Create 2D art, 3D models, and audio with AI

Publishing Your Game

Prepare an export with the templates and toolchains installed for your target. Store submission remains creator-controlled.

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Knowledge Base

Common questions about Summer Engine:

What is Summer Engine?

The AI game engine. Build games by describing them.

Is Summer Engine compatible with my existing project?

Commit a copy first, then verify the editor, imports, plugins, native extensions, and exports against the compatibility reference.

Is my code safe?

Privacy Mode is available on paid plans. When enabled, code is never stored by model providers or used for training.

How good are AI-generated assets?

Great for prototyping and indie games. Learn the tradeoffs.

Can I make a game with just AI, no coding?

Start in natural language. Summer Agent can draft scenes and GDScript while you review, test, and integrate the result.

How do I get support?

Founders respond personally. Discord, email, and more.

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What You Can Do

Summer Engine brings AI directly into your game development workflow. Whether you want to describe a game in plain English or dive deep into engine code, Summer Engine adapts to you.

Scene Operations

Describe scene changes in plain English - “Add a player that can jump”

Project Intelligence

AI understands your entire project - code, scenes, assets, and relationships

Specialist Agents

Expert AI agents for 3D modeling, audio design, and complex systems

Asset Generation

Generate art, models, and audio - clearly labeled as AI-generated

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For Pros and New Game Devs

Summer Engine is designed for everyone who wants to make games. It combines the ease of “vibe coding” with the power of a professional game engine.

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For Creators & Vibe Coders

  • Start in natural language: Ask Summer Agent to draft scenes and GDScript, then review and test the result
  • Documented asset workflow: Follow the asset-generation guide for currently supported providers, licensing, and quality tradeoffs
  • Learn as you go: Watch how Summer Engine builds things to learn game development naturally
  • Focus on fun: Skip the boilerplate and get straight to the gameplay

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For Professional Developers

  • Ship commercial games: We shipped Don’t Pray on Steam in 2.5 months using Summer Engine
  • Full Engine Access: You have total control over every node and script
  • Code Quality: AI writes clean, structured GDScript that follows best practices
  • Accelerated Workflow: Handle tedious tasks instantly so you can focus on architecture and polish
Summer Engine removes boilerplate and accelerates iteration while giving you the option to dive as deep as you want. New models are evaluated before they are exposed; availability is documented instead of promised on a fixed schedule.

Unified Workflow

One editor, one context. Design, code, and playtest without tab juggling.

Expert AI Agents

Bring in 3D or Audio AI specialists on demand. Deep help without leaving flow.

Safe AI Operations

Engine‑level edits with full undo. No surprise file rewrites.

Open Existing Projects

Evaluate a committed copy of an existing project. Familiar formats and concepts reduce migration work; verify imports, plugins, native extensions, and exports against the current Summer Engine release.

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Ready to Build?

Download Summer Engine

Get started with the AI game engine today

Browse 150+ Game Templates

Start from a template: shooter, RPG, platformer, horror, and more
Need help or have questions? Reach out to our founders at founders@summerengine.com or join our community on Discord for fast responses.