This is not intended to be a theory thread nor a long one.

I just played BGE and note a lot of similarities to FF8 and some FF7 references like the "materia christals".

1-Jade gets infected by some aliens as Edea gets possessed.

2-Jade owns an orphanage related to a lighthouse like Edea.

3-The main city is shielded a little like Esthar.

4-The beluga looks a lot like the Ragnarok.

5-Aliens fall from the moon in meteors

6-An interactive battle with aliens appear on the moon on the same way that we see the students battling with the soldiers on GG.

7-Mamago garage is located on the middle of the ocean and the rhinos fix things a little like in FH.
You can even use the roof to land the ship.

8-The orphans had their fathers killed in a war against the Domz (aliens).

9-One of the hovercraft runners is called "Doctor Benzine"

10-From the outside the factory resembles a single pillar from the DDprison along with one of the upper pathway pair.

11-An anttena appears over a mountain near the main city.

I wonder if they got inspired by FF8?