well, there are 2 games that i know of, but 1 of them i'm not sure if it needs to be downloaded or not. 1st is Adventure Quest (doesn't need download), and 2nd is Maple Story (not sure if it needs to be downloaded). other than those 2, i don't know any others besides Runescape.

(if this helped, plz give karma, though i'm not sure wtf it does)