The song "BONUS TRACK" by ASTARXTH talks about the artist's personal struggles and journey to achieve his goals. He feels misunderstood by his family and loved ones, but he remains true to himself and refuses to change for anyone. He describes his inner thoughts and the complexity of his mind, comparing it to a labyrinth. Despite the challenges he faces, he is focused on his success and is ready to run through obstacles with his crew by his side. He also expresses his determination to be successful not just for himself, but for his family, and acknowledges those who support him. The song also references his desire for a better life, symbolized by the metaphor of flying on a private jet. Overall, "BONUS TRACK" is a raw and honest portrayal of ASTARXTH's personal struggles and ambitions.