I have noticed people are very confused about the difference between Runescape (Runescape "2") and Runescape Classic.
Runescape (2) is what everyone plays today, Runescape Classic can be played by becoming a member and you can play by going to the bottom of the runescape homepage. Runescape (2) is just an updated version of classic, Runescape classic was a more 2-D and worse graphic game (hard to beileve?!!), which was easy to cheat on aswell. This is why they updated it.
So what about a Runescape 3???
The fact is there will probably not be a "Runescape 3" this is because there isn't a major reason to. I can't see it ever being made or it be made anytime soon.
I hope this helps people who were confused!!