Just stay away from this if you're a hard-working developer. I'm only trying to save you time. Don't let this guy pull the wool over your eyes and try to tell you old tall tales about PC Graal, because literally 90% of what he says is an absolute lie. There's a lot of naive little kids from iClassic who are very attracted to material from the days of PC Graal (like GOAT, the dude who studies old Graal forum posts), but this is not a person you should trust or even listen to.
Doomsday was a very cool server back in those days and the server was closed when the manager, Tifa, stepped down (in, I think, 2004). She felt as if no one else was fit or ready at the time to handle the responsibilities that came with managing the server, so when she left she asked for the entire server to be closed down.
If people such as Tifa, Davio, Sliq, InZane, Cid, Leov, Baraka, Jubei, and other Doomsday regulars still even had this game in the back of their mind, I'm sure they would denounce this "revival" effort and tell you that this guy never even had anything to do with Doomsday. The levels are stolen from old level packs that were leaked when Graal servers were hacked. He did the same thing to Shaded Legend (which was not even named correctly, it was never "Shaded Legends") and that server failed.
Just spreading some knowledge and trying to help.