This tutorial guides developers on how to add real-time engagement features, specifically a face filter, in their game. The process involves using an existing project and applying a face filter feature to the player. Key prerequisites include having an Agora developer account, a Photon developer account, Banuba Face AR SDK for Unity, and Unity 2019.3 or up. Developers are also required to obtain a Banuba client token from [email protected]. The tutorial covers steps such as importing the Banuba package, setting up the BNBARStuff prefab, creating a render texture, creating a local view prefab, setting up a drop-down list for masks, and making code modifications to spawn with the Banuba FaceFilter-Enabled Prefab. The tutorial concludes by encouraging developers to reach out if they encounter any issues during implementation.