Alone is a purchasable stage in Piano Tiles 2 and it is one of five payment songs. To play, you can try it by watching an ads or buying it for USD $2.99, or you can get it free by collecting 100 song fragments (before unlocking Faded and The Spectre). Like other Alan Walker songs, this song has star effect leading in the sky with many other effect. Another popular song by Alan Walker with Faded, Spectre and Sing Me To Sleep.