Since we are using Unity as the engine for our game The Campaign, our game collects some or all of the following information about your device: unique device identifiers (e.g., IDFV for iOS devices and Android ID for Android devices); IP address; country of install (mapped from IP address); device manufacturer and model platform type (iOS, Android, Mac, Windows, etc.) and the operating system and version running on your system or device; language; CPU information such as model, the number of CPUs present, frequency, and instruction set support flags; the graphics card type and vendor name; graphics card driver name and version (e.g., “nv4disp.dll 6.10.93.71”); which graphics API is in use (e.g., “OpenGL 2.1” or “Direct3D 9.0c”); amount of system and video RAM present; current screen resolution; version of the Unity Editor used to create the game; sensor flags (e.g., device support for gyroscope, touch pressure or accelerometer); application or bundle identification (“app ID”) of the game installed; unique advertising identifiers provided for iOS and Android devices (e.g., IDFA or Android Ad ID); and a checksum of all the data that gets sent to verify that it transmitted correctly.

Source: https://unity3d.com/legal/privacy-policy.