I worked on the old Online Fighting remake so I’ve got a couple answers for you:
It was essentially a fighting game, kinda like sword fight on the heights. The only methods of combat were curses, swords, and guns.
There was none, almost all of the lore for / what occurs in the Old Sea was added in long after the game concluded development (most of which was added in Arcane Adventures)
There are a couple interesting lore bits that occured in-game that are worth a mention , though:
The major government/power in the Old Sea were the Marines. They were likely just a stand-in for One Piece’s World Government, and likely aren’t canon anymore (or have been retconned into being the Arcane Government)
Freedrock got stranded on an island after his ship got sunk by the Marines.
Rupin “guards” the fire curse, and his sister Pelat can be found on a nearby town island
The plan was to make a story for it but idk what that would’ve been.
Whoever was writing the story really didn’t like talking about it to the other developers, which lead to communication issues
In game creation communication is vital.
Btw if I knew how to code (and overall if I was not having a severe skill issue that makes unable to do something on Roblox Studio) I would try to make a game. (The worst part about it being that I actually have ideas)
Anyway, it would have cool to see this remake