🤖 Adding a Game Center Plugin to Your Project

Introduction

In this article, I’ll show you how to add the official Godot plugin for integrating with Apple’s Game Center to your project.

First off, what is Game Center? For those unfamiliar, it’s a feature available on iOS devices like iPhones and iPads. By signing in with an Apple ID, Game Center records achievements and allows players to compete on leaderboards in supported games. Developers can set achievements, define their completion criteria, and decide what to compete for on the leaderboards.

Using the Game Center plugin in Godot, you can easily integrate these features into your games, which is pretty awesome.

By the way, you can find the official documentation and source code at the Godot iOS plugins repository , so take a look there first. If there’s anything you don’t quite understand, you can always come back to this article.

Author's Environment at the Time of Writing
Godot Version: 4.2.1
Computer Model: MacBook Air M1, 2020
OS: macOS 14.4.1

Clone the Plugin Repository

First, head over to this Github page and follow the steps there. However, they’re not very detailed, so I’ll explain the nitty-gritty parts here.

Start by opening your Terminal (Mac) or Command Prompt (Windows) and navigate to where you want to clone the repository. It can be outside your game project folder—actually, that might be better if you plan to reuse the Game Center plugin in other projects.

Let’s say you decide to use the folder ~/Godot/Plugins. To navigate there, use:

cd ~/Godot/Plugins

Once you’re there, clone the GitHub repository and its submodules with the following command:

git clone --recursive https://github.com/godotengine/godot-ios-plugins.git

If cloning the submodules fails and you see an error, follow these steps. First, navigate to the newly cloned local repository:

cd godot-ios-plugins

Then, try this:

git submodule update --init

Next, update the godot submodule:

cd godot
git fetch
git checkout origin/<branch you want to use>
# For example, if you want version 4.2
git checkout origin/4.2

Generate the Godot Header

Now, let’s create something called a “Godot header.” It helps make Godot features compatible with iOS languages like Objective-C or Swift.

Navigate to the godot folder within godot-ios-plugins:

cd godot-ios-plugins/godot/

The build command you’ll use looks like this:

scons platform=ios target=editor

If you encounter issues, the fix I found helpful was documented here .

After building the header, you’ll need to build the .a static library. Return to the main repository directory and use these commands:

scons target=release_debug arch=arm64 simulator=yes plugin=gamecenter version=4.0
./scripts/generate_static_library.sh gamecenter release_debug 4.0

Then, build the .xcframework library:

./scripts/generate_xcframework.sh gamecenter release_debug 4.0

Add the Plugin to Your Godot Project

Follow the official Godot documentation for Creating iOS plugins but note these tips.

First, you need to create a folder for iOS plugins in your Godot project’s root directory, like so: ~/Desktop/my_game/ios/plugins.

Copy godot-ios-plugins/plugins/gamecenter/gamecenter.gdip and godot-ios-plugins/bin/gamecenter.release_debug.xcframework into this folder. Rename gamecenter.release_debug.xcframework to gamecenter.xcframework.

Set Up Export

Finally, set up your export settings in Godot. Open the Export panel from the Project menu and ensure the Game Center plugin is enabled under the iOS options. Specify an export path outside your project directory to avoid recursion issues.

Conclusion

That’s it for adding the Game Center plugin to your project. Thanks for reading! If something doesn’t work, feel free to highlight any issues, and I’d appreciate your feedback.

Lastly, allow me to plug my games that use the Game Center plugin. Check out Slashing Samurai and Lovely Solitaire on the App Store. Thanks!

👹 Slashing Samurai

Test your reflexes and timing! Control a samurai and slice through objects falling from the sky in this addictive, one-handed casual game.

🃏 Lovely Solitaire

Enjoy the classic Klondike solitaire—now available on your mobile device! Play Lovely Solitaire, now on the App Store.

♣️ Quick Hand Poker

When it comes to popular classic casino card games, poker is a standout. However, in the mobile casual game “Quick Hand Poker,” it has been transformed into a puzzle game. The controls are simple—just touch the cards as quickly as possible to form as many poker hands as you can! Available now on the App Store!