When your planet gettings invaded by friendly but ruthless aliens and an AI offers you the opportunity to play the greatest tower defense game the universe has ever created, what do you do? 
You accept, of course.
Finding a way to survive can come later.
Morgan certainly thinks so.
But when aliens are attacking your station and giant six-eyed rats are eating your robotic face, you start to doubt these choices. Accidentally starting a war doesn't help, either.

Welcome to the Universe is a Litrpg space opera story with tower defense, adventure, and dungeon building elements.