Alien towers have sprouted up across the island. Now, you must climb to the top of eight towers and detonate powerful bombs. As you climb the tower, I-Balls, Spheroids, and dissolving pathways threaten your very existence. However, you can fire Carbonobombs, use high speed elevators, and escape into doorways to avoid these obstacles. See if you can destroy the towers in CASTELIAN. Eight towers; detonate powerful bombs; avoid a variety of enemies; fire Carbonobombs; ride in an elevator; escape into doorways.