I know they said summer, but is there anything more specific?
isn't it already released?
Based on how the beta progress is coming, I'd say August sometime. I don't think it'll be ready for a July release.
Is there currently a trial with test servers?
How do you play HTML5 version?
You never explained how to actually get into the HTML5 version, you just explained what it was..
You didn't see the big green button that says "Go to beta" in the link?
I did that, logged in, then all I see is an option to play NIS system, not HTML5 client.
Is there currently a trial with test servers?
Is RS3 like RS2 or is it COMPLETELY different? I dont understand why they came out with rs3 instead of the HTML5
The HTML 5 is what Runescape 3 basically is they are switching off of Java which should expand what they are able to do.

