18 Alien invasion At the SETI Institute in Mountain View, California, a cadre of dedicated scientists sifts through radio static in search of a telltale
signal from an alien civilization.
Faced with insurmountable odds, Shepard is forced to flee the planet in order to gather
support from alien civilizations and mount a counter-attack while also having to deal with Cerberus, who have decided to turn against him / her.
An international team of scientists from the SETI Institute, the private organization that is searching for signs of extraterrestrial life, revealed that it received mysterious signal spikes last year that could have possibly
come from an alien civilization.
Electromagnetic signals (blue circles)
from alien civilizations will continue traveling through the Milky Way even after the aliens are gone.