I want to add that if they were to invest more time on the game, they could even let you download all the data you need. So all the things in the game will be on your computer. Of course, It takes up more space than the original.
I was able to buy a Ragnarok Online CD where you could play offline, called "ragnarok offline" btw. The original if I could remember took 600 MB while Ragnarok Offline is about 2-4 GB or more. Also, it's very buggy. I remember you can patch that game up for the newer versions.
So this method isn't really effective.
Proud Member of the Mega Mario Movement Yummy Yoshi Yankees