Ingris was once a prosperous and beautiful planet where humanity thrived. However, upon the opening of a dimensional gate, they were invaded by two forces. The Vulgus, a technologically-advanced alien race; and the Colossi, a race of biomechanical Kaiju that came through the rift on their heels.
https://tvtropes.org/pmwiki/pmwiki.php/VideoGame/TheFirstDescendant

