I like D-Unit’s suggestion, although I didn’t see any German words on that site that would suit the title which meant dusk or nightfall. Maybe a latin word?
“Panzer Dragoon Fall” on it’s own sounds a bit blunt.
“Panzer Dragoon Genos” might actually be quite appropriate for the current story, but it’s Lord Craymen’s idea and I don’t know if he’d appreciate us using the name.
Isn’t Apocalipse a greek word?
Or take the name of something or someone important from the story.
So no Atrai, Farith or Adienna for you. 
Yes it is.
Then I sugest it as codename for the project.Like I said before : it’s better to get a real title after the plot is all done.
Another weird suggestion:
Panzer Dragoon:Meteoron
Meteoron= Greek for “phenomenon of the skies”
Actually meteoron is a word to describe the state that something that is kept aloft is on. Not exactly flying. I guess it was also used to describe things falling from the sky and other similar stuff… Don’t think it’s a very appropriate word at all imo. It’s got quite a few different meanings depending on which era exactly it refers to so ppl that know of the word could get different meanings each… and to me it sounds quite silly as a title… Why do u guys want greek words anyway, heh.
Anyway, I think it’s a good advice to first come up with the storyline and see what it’s about then possibly find a title in english and then after that find a fancy greek or latin or whatever you want word that describes that 