at the conclusion of The Headmasters, Galvatron's icy tomb is discovered by Cyclonus, whose body Galvatron modifies to accommodate his own head in the chest compartment. Seeking a more fitting form, Galvatron directs Cyclonus to approach the disembodied head of Unicron, who is convinced to help Galvatron attain a combiner form with Cyclonus as its core. To accomplish this, Unicron opens dimensional rifts in order to bring Curse Armada Thrust, Zombie War Breakdown, and Wandering Roller into their world. To Cyclonus' surprise, Starscream makes an appearance, expressing interest in joining this new alliance. Unicron grants Starscream a new physical form, and Galvatron's head takes control of his new minions to take on his new form of Galvatronus. Film series Debuting in Transformers: The Last Knight, the six horns of Unicron began appearing out of the Earth in response to the approach of Cybertron. Unicron is noted by Quintessa to be another name for Earth, and Optimus Prime recognizes Unicron as Cybertron's ancient enemy. Quintessa plans to drain Unicron's energy to restore the damaged Cybertron, killing life on Earth in the process. Simmons later helps Burton locate an ancient book containing details about Unicron, noting that the center-point of Unicron's horns (during the era when all of the Earth's continents formed Pangaea) is Stonehenge. Megatron and Quintessa begin draining energy from Unicron but are foiled, and later Quintessa (disguised as a human) approaches a scientist studying one of Unicron's horns to warn him not to touch the chaos-bringer and offers a way to kill him. Video games Unicron is among the characters appearing in the 2004 Transformers video game for the PlayStation 2.<ref>Atari Begins the ``Ultimate Conflict with Worldwide Release of 'TRANSFORMERS' Video Game, Business Wire, May 12, 2004</ref> Unicron begins attacking Cybertron, requiring the Autobots to collect enough Mini-cons to create a power-up mode for Optimus Prime. The player must chase Unicron as he orbits around Cybertron and enters his maw as he prepares to fire, blasting him with the Matrix Cannon until eventually Unicron is destroyed. Unicron is mentioned a number of times in Transformers: Prime The Game. Eons ago, Unicron created Thunderwing to serve him and destroy the Matrix of Leadership. After Unicron's demise, a meteor of Dark Energon with Thunderwing sealed within crashes on Earth. Optimus Prime comes across the meteor and finds Thunderwing who reveals that he is a minion of Unicron and his mission was