So I was perusing the internet to try and find a working Java version of GoF2 to test out on an old phone, when I came across this. Turns out it's actually a MOD for the Java version!
It's called 'Galaxy on Fire 2: Second Dimension', and seems to revolve around a plot where pirates steal a Deep Science weapon!
This is what the description says (in terrible English):
Was leaked to the Deep Science which was used by pirates...With the new beam (with a dip in stolen information Sainz were the results of a survey of the remains of their ship and Void and unknown drawings) that they have created from drawings Void they managed to get rid of their main enemy...Keith Maxwell moves into another dimension where all of the other , Pirates once again threaten the entire galaxy.
Translated for non-plebs:
A Deep Science [weapon?] was leaked to pirates. With this new beam (taken [possibly] from blueprints in a ship destroyed by the Voids) that the Voids used to kill their enemy (presumably Deep Science fighters), Keith T. Maxwell is somehow transported into an alternate dimension where Pirates threaten the entire galaxy.
There's another mod called 'Dark Space', but I think it's just a retexture.
Interesting, huh? I've never heard of GoF mod(ification)s before. I'm thinking of purchasing an old phone just to download it and try it out.