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...
Fort-class BETA have appeared at 5606! 
Alpha Squadron is to mobilize immediately!
ظهرت بيتا من فئة فورت عند النقطة 5606! على سرب ألفا 
!أن ينتقل على الفور
Die BETA der Fort-Klasse sind auf 5606 erschienen!
Die A-Staffel soll sich sofort mobilisieren!
¡BETA de clase Fortaleza
avistados en 5606!
¡BETA de clase Fortaleza
avistado en 5606!
Classe Fort repérés à 5606 !
BETA di Classe Fortezza al 5606! 
La Compagnia Alfa deve mobilitarsi immediatamente!
Um BETA de classe Fortaleza apareceu em 5606!
Esquadrão Alfa, preparem-se imediatamente!
В точке 5606 появился фортовик!
Эскадрилья А, на вылет! Повторяю!