On April 19th, 1973, a race of extra-terrestrial lifeforms launched a landing unit from the moon, which touched down on Earth, in central Asia. Ever since, mankind has been engaged in a losing war against this alien species, known as the BETA, as they have gradually expanded outwards across the globe. After 20 years of non-stop fighting, the war has reached the shores of Japan...
As the invaders were Beings
بما أنّ الغزاة كانوا مخلوقات
Die Eindringlinge wurden als feindliche Wesen
außerirdischen Ursprungs wie folgt genannt:
Como se trataban de seres de origen
extraterrestre adversos a la humanidad,
Como se trataban de seres de origen
extraterrestre adversos a la humanidad,
Ces envahisseurs extra-terrestres,
Dal momento che gli invasori
Como os invasores extraterrestres
Безжалостные внеземные твари, агрессивно 
настроенные против людей, были названы...