The RudderStack Unity SDK is a wrapper for the RudderStack Android SDK and iOS SDK and is used for tracking game event data. After integrating this SDK with your game, you will be able to track your game event data and send it to your specified destinations via RudderStack.

Check the GitHub codebase to get a more hands-on understanding of the SDK.

SDK setup requirements

To set up the RudderStack Unity SDK, the following prerequisites must be met:

• You need to set up a RudderStack account.
• Once signed up, set up a Unity source in the dashboard. You should be able to see a Write Key for this source, as shown below:

• You will also need a data plane URL. Refer to the Glossary for more information on the data plane URL and where to find it.
• Finally, download and install the Unity development kit.

Installing the Unity SDK

Follow these steps to integrate the RudderStack Unity SDK with your project:

• Download rudder-sdk-unity.unitypackage from our GitHub repository.
• Import the downloaded package to your project. From the Assets menu, go to Import Package - Custom Package... as shown:

• Select rudder-sdk-unity.unitypackage from the downloaded location and click Open, as shown:

• Click Import in the import popup as shown:

Initializing the RudderStack client

To initialize the RudderStack client, follow these steps:

• Add the import to all the files where you wish to use RudderClient .

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using RudderStack;

• Then, add the following code in the Awake method of your main GameObject Script:

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// Critical for iOS Applications where multiple components are using SQLite
// This has no effect for Android, but can be added as a safety check
RudderClient.SerializeSqlite();

// Build your config
RudderConfigBuilder configBuilder = new RudderConfigBuilder()
    .WithDataPlaneUrl(DATA_PLANE_URL);
    .WithLogLevel(RudderLogLevel.VERBOSE)

// get instance for RudderClient
RudderClient rudderClient = RudderClient.GetInstance(
    WRITE_KEY,
    configBuilder.Build()
);

Configuring your RudderStack client

You can configure your client based on the following parameters using RudderConfigBuilder:

Self-hosted control plane

If you are using a device mode destination like Adjust, Firebase, etc., the Unity SDK needs to fetch the required configuration from the control plane. If you are using the Control Plane Lite utility to host your own Control Plane, then follow the steps in this section and specify controlPlaneUrl in your RudderConfigBuilder that points to your hosted source configuration file.

Identify

The Unity SDK captures the deviceId and uses that as the anonymousId for identifying the user. This helps in tracking the users across the application installation. To attach more information to the user, you can use the identify method. Once the SDK identifies the user, it persists and passes the user information to the subsequent calls.

To reset the user identification, you can use the reset method.

RudderStack provides some pre-defined APIs for building the RudderTraits object like PutEmail(), PutAge(), etc. These APIs can be used to set the values of the standard traits by directly passing them as parameters.

For the custom traits which do not have any pre-defined API, you can use the Put() method and pass a key-value pair of the trait, as shown in the sample identify event below:

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RudderMessage identifyMessage = new RudderMessageBuilder().Build();
RudderTraits traits = new RudderTraits();
//pre-defined API's for inserting standard traits
traits.PutEmail("alex@example.com");
traits.PutAge("40");
//Put API to insert custom traits
traits.Put("location", "New Orleans");
traits.Put("gender", "Male");
traits.Put("consent", "Granted");
rudderClient.Identify("some_user_id", traits, identifyMessage);

Overriding anonymousId using setAnonymousId

You can explicitly set the anonymousId for all the future events using the setAnonymousId() method, as shown:

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rudderClient.setAnonymousId("anonymousID1");

Track

You can record the users' in-game activity through the track method. Every user action is called an event.

A sample track event is as shown:

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// create event properties
Dictionary<string, object> eventProperties = new Dictionary<string, object>();
eventProperties.Add("test_key_1", "test_value_1");
eventProperties.Add("test_key_2", "test_value_2");

// create user properties
Dictionary<string, object> userProperties = new Dictionary<string, object>();
userProperties.Add("test_u_key_1", "test_u_value_1");
userProperties.Add("test_u_key_2", "test_u_value_2");

// create message to track
RudderMessageBuilder builder = new RudderMessageBuilder();
builder.WithEventName("test_event_name");
builder.WithUserId("test_user_id");
builder.WithEventProperties(eventProperties);
builder.WithUserProperties(userProperties);

rudderClient.Track(builder.Build());

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// create message to track
RudderMessageBuilder builder = new RudderMessageBuilder();
builder.WithEventName("test_event_name");
builder.WithUserId("test_user_id");
builder.WithEventProperty("foo", "bar");
builder.WithUserProperty("foo1", "bar1");

rudderClient.Track(builder.Build());

Screen

The screen call lets you record the user activities on their mobile screen with any additional relevant information about the viewed screen.

A sample screen event is as shown:

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// create screen properties
Dictionary < string, object > screenProperties = new Dictionary < string, object > ();
screenProperties.Add("key_1", "value_1");
screenProperties.Add("key_2", "value_2");

RudderMessageBuilder screenBuilder = new RudderMessageBuilder();
screenBuilder.WithEventName("Home Screen");
screenBuilder.WithEventProperties(screenProperties);
rudderClient.Screen(screenBuilder.Build());

Reset

The reset method clears all the persisted traits of the previously identified user.

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rudderClient.Reset();

Upgrading the SDK

To upgrade the SDK, remove all the files related to the SDK from the Plugins folder. Also, remove the Rudder folder completely before importing a newer version of the SDK.

You can find the following files in the Plugins folder for the SDK:

• Plugins/Android/unity-plugin-release.aar
• Plugins/iOS/RudderSDKUnity

Advertisement ID

RudderStack collects the advertisement ID only if withAutoCollectAdvertId is explicitly set to true during the SDK initialization, as shown:

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RudderConfigBuilder configBuilder = new RudderConfigBuilder()
    .WithDataPlaneUrl(DATA_PLANE_URL);
    .WithLogLevel(RudderLogLevel.VERBOSE)
    .withAutoCollectAdvertId(true);

Tracking application lifecycle events on the Android platform

The Unity SDK automatically tracks the Application Lifecycle Events to get insights into the app metrics like installs, opens, updates, etc. However, you can disable the automatic tracking by setting the withTrackLifecycleEvents parameter to false, as shown:

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RudderConfig config = new RudderConfigBuilder()
  .WithTrackLifecycleEvents(false)

To track the application life cycle events on the Android platform, you need to add the RudderPreferbs.prefab file from the path Assets/Rudder/RudderPreferbs.prefab to every scene in your Unity app. Also, ensure that the RudderPreferbs.prefab is linked to the RudderClient.cs script.

Triggering Application Updated lifecycle event

The following requirements must be met to ensure that the Application Updated lifecycle event is triggered:

• For iOS: Make sure the Bundle version in the Info.plist file of your application is incremented. If the Bundle version of your target points to the Bundle version of your project, then increment it.
• For Android: Make sure the versionCode in the defaultConfig object nested in the android object of your app's build.gradle is incremented.