In what fictional work does the planet Cybertron feature?
List of Transformers planets
Cybertron is a fictional planet, the homeworld of the Transformers in the various fictional incarnations of the metaseries and toyline by Hasbro. In the Japanese series, the planet is referred to as "Cybertron" (first shown on Japanese "Galaxy Force" packaging, despite the fact that "Cybertron" is the Japanese name for "Autobot") pronounced as セイバートロン "Seibātoron". Cybertron is populated by mechanical life forms of variable size who can transform into all kinds of machinery. These are called Cybertronians, or Transformers.
Megatron
A younger version of "Prime" Megatron appears in the 2010 video game "" voiced by Fred Tatasciore. In the Decepticon Campaign, Megatron fights to return Cybertron to his version of the "golden age" by any means necessary. He discovers a source of all-powerful Dark Energon guarded by in a research station in orbit. Despite warnings from Starscream and his partner Jetfire that Dark Energon destroys all those who come into contact with it, Megatron obtains it and immerses himself in it, and uses it to power the Decepticon war effort. After Megatron corrupts the Core of Cybertron with Dark Energon, Cybertron begins shutting down to recover from the corruption in "". Megatron blames Optimus Prime for the death of the planet, but is killed by Metroplex. After being revived by Soundwave, Megatron leads his army into space to strip Earth of its resources. Megatron also appears in "", set in between "War for Cybertron" and "Fall of Cybertron", in which he attempts to harness the power of the Dark Spark.