Configuring Build Settings for Multi-Platform Deployment

Learners will configure the Build Settings window to manage target platforms, scene inclusion, and player settings for desktop and mobile environments.

In this lesson, you will learn how to prepare your project for cross-platform distribution by configuring the Build Settings window to handle scene inclusion, platform-specific compilation, and player settings.

Managing Scenes and Targets

The Build Settings window (accessible via File > Build Settings) is the command center for your final deployment. At the top, you manage the Scenes In Build list. For multiplayer projects, ensure your Lobby scene is at index 0, followed by your game levels. Only scenes added here are included in your final executable, which is critical for keeping build sizes lean.

Next, you select your Platform (e.g., PC, Mac & Linux Standalone, Android, or iOS). When you click Switch Platform, Unity re-imports assets to ensure compatibility with that specific target’s hardware architecture, graphics APIs, and texture compression formats.

Leveraging Platform-Dependent Compilation

Since your multiplayer game may behave differently on desktop versus mobile (e.g., different input systems or performance budgets), use Platform-Dependent Compilation in your scripts. This allows you to include or exclude code based on the target platform during the build process:

void Start() {
#if UNITY_STANDALONE
    Debug.Log("Initializing desktop mouse/keyboard input.");
#elif UNITY_ANDROID || UNITY_IOS
    Debug.Log("Initializing mobile touch controls.");
#endif
}

Configuring Player Settings

For each platform, you must configure Player Settings to define your Bundle Identifier, App Version, and splash screen behavior. For mobile deployments, this is where you specify the Target Architectures (like ARM64) and minimum API levels. For desktop, you configure display resolution and window modes.

Always verify your Scripting Backend settings here—typically IL2CPP for performance and security—before running your build. Because you have already implemented Unity Relay and Netcode for GameObjects, ensure your Network Transport settings are compatible with the firewall and connectivity requirements of your target operating systems.

Key Takeaway: Efficient multi-platform deployment relies on keeping your build scene list clean, utilizing platform-dependent compilation for hardware-specific features, and ensuring your Player Settings match the performance and security requirements of the target device.