To the stupid people out here that think this is fraud because of a cache folder: Runescape has different reasons to make a standalone cache.
1. They use Java wich is a more advanced protocol than flash.
2. If you have EVER actually played runescape, you must've noticed that they really use a lot of graphics, or am I wrong?
Oh, yes! It's entertaining! But addictive. This is perhaps the best Java game out there, and the only problem is that it is addictive. Contradicting other people's comments, it has offensive language blockers and also a 'Report Abuse' system for you to report someone if they are breaking the rules (which includes harmful language). 10/10.