OpenFront.io is an online real-time strategy game focused on territorial control and alliance building. Players compete to expand their territory, build structures, and form strategic alliances in various maps based on real-world geography.

This is a fork/rewrite of WarFront.io. Credit to https://github.com/WarFrontIO.

License

OpenFront source code is licensed under the GNU Affero General Public License v3.0

Current copyright notices appear in:

Footer: "© OpenFront and Contributors"
Loading screen: "© OpenFront and Contributors"

Modified versions must preserve these notices in reasonably visible locations.

See the LICENSE for complete requirements.

For asset licensing, see LICENSE-ASSETS.
For license history, see LICENSING.md.

🌟 Features

Real-time Strategy Gameplay: Expand your territory and engage in strategic battles
Alliance System: Form alliances with other players for mutual defense
Multiple Maps: Play across various geographical regions including Europe, Asia, Africa, and more
Resource Management: Balance your expansion with defensive capabilities
Cross-platform: Play in any modern web browser

📋 Prerequisites

npm (v10.9.2 or higher)
A modern web browser (Chrome, Firefox, Edge, etc.)

🚀 Installation

Clone the repository

git clone https://github.com/openfrontio/OpenFrontIO.git
cd OpenFrontIO

Install dependencies
```
npm run inst
```
Do NOT use npm install nor npm i but instead use our npm run inst. It runs the safer npm ci --ignore-scripts to install dependencies exactly according to the versions in package-lock.json and doesn't run scripts. This can prevent being hit by a supply chain attack.

🎮 Running the Game

Development Mode

Run both the client and server in development mode with live reloading:

npm run dev

This will:

Start the webpack dev server for the client
Launch the game server with development settings
Open the game in your default browser (to disable this behavior, set SKIP_BROWSER_OPEN=true in your environment)

Client Only

To run just the client with hot reloading:

npm run start:client

Server Only

To run just the server with development settings:

npm run start:server-dev

Connecting to staging or production backends

Sometimes it's useful to connect to production servers when replaying a game, testing user profiles, purchases, or login flow.

To replay a production game, make sure you're on the same commit that the game you want to replay was executed on, you can find the gitCommit value via https://api.openfront.io/game/[gameId]. Unfinished games cannot be replayed on localhost.

To connect to staging api servers:

npm run dev:staging

To connect to production api servers:

npm run dev:prod

🛠️ Development Tools

Format code:
```
npm run format
```
Lint code:
```
npm run lint
```
Lint and fix code:
```
npm run lint:fix
```
Testing
```
npm test
```

🏗️ Project Structure

/src/client - Frontend game client
/src/core - Shared game logic
/src/server - Backend game server
/resources - Static assets (images, maps, etc.)

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Request to join the development Discord.
Fork the repository
Create your feature branch (git checkout -b amazing-feature)
Commit your changes (git commit -m 'Add some amazing feature')
Push to the branch (git push origin amazing-feature)
Open a Pull Request

🌐 Translation

Translators are welcome! Please feel free to help translate into your language. How to help?

Join the translation Discord
Go to the project's Crowdin translation page: https://crowdin.com/project/openfront-mls
Login if you already have an account / Sign up if you don't have one
Join the project
Select the language you want to translate in. If your language isn't on the list, click the "Request New Language" button and enter the language you want added there.
Translate the strings

Feel free to ask questions in the translation Discord server!

Project Governance

The project maintainer (evan) has final authority on all code changes and design decisions
All pull requests require maintainer approval before merging
The maintainer reserves the right to reject contributions that don't align with the project's vision or quality standards

Contribution Path for New Contributors

To ensure code quality and project stability, we use a progressive contribution system:

New Contributors: Limited to UI improvements and small bug fixes only
- This helps you become familiar with the codebase
- UI changes are easier to review and less likely to break core functionality
- Small, focused PRs have a higher chance of being accepted
Established Contributors: After several successful PRs and demonstrating understanding of the codebase, you may work on more complex features
Core Contributors: Only those with extensive experience with the project may modify critical game systems

How to Contribute Successfully

Before Starting Work:
- Open an issue describing what you want to contribute
- Wait for maintainer feedback before investing significant time
- Small improvements can proceed directly to PR stage
Code Quality Requirements:
- All code must be well-commented and follow existing style patterns
- New features should not break existing functionality
- Code should be thoroughly tested before submission
- All code changes in src/core MUST be tested.
Pull Request Process:
- Keep PRs focused on a single feature or bug fix
- Include screenshots for UI changes
- Describe what testing you've performed
- Be responsive to feedback and requested changes
Testing Requirements:
- Verify your changes work as expected
- Test on multiple systems/browsers if applicable
- Document your testing process in the PR

Communication

Be respectful and constructive in all project interactions
Questions are welcome, but please search existing issues first
For major changes, discuss in an issue before starting work

Final Notes

Remember that maintaining this project requires significant effort. The maintainer appreciates your contributions but must prioritize long-term project health and stability. Not all contributions will be accepted, and that's okay.

Thank you for helping make OpenFront better!

OpenFrontIO

Install / Use

README