Despite not actually appearing during the game, our planet Earth is stated to exist on the Tyrian universe. Earth is said to be at least 101 years away from the Tyrian Sector, and it's existence seems to be known by the people on the sector. At the end of the fourth episode, Trent Hawkins decides he's had enough of the war and enter cryostasis, while his ship sets destination after Earth.

During the fifth episode, an archaeological expedition on Savara retrieves some mysterious grey books, which are believed to be originated on Earth and have a connection to the past of Tyrian.