Application.runInBackground

Description

Should the player be running when the application is in the background?

Default is false (application pauses when it is in the background).

Note: This property is ignored on Android and iOS.

    // Make the game run even when in background
    Application.runInBackground = true;

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Example() {
        Application.runInBackground = true;
    }
}