http://funkyphysics.com/crush-the-castle-players-pack/ (not that relevant to the article, IQ# is not required) (Added, Physbook Founder, Feb. 19th, 2010)
(Last Update: pict services has changed to be passive blocked visitors IP from PRC , Physbook Founder, Feb. 19th, 2010)
This is a guest post from physbook team, and protected under CC BY-NC-SA 3.0 License. Unless otherwise stated in the comment text, without author(s) written permission, please specify: Reprinted from Physbook (RSS)/转自飛思播客 (RSS) with the article's link (Please do not change the Title. Remain the link same at least because we could make changes on the content in further updates otherwise you will be responsible to the mistake you spread to readers) OR Trackback/Pingback in the comment "[...]quotes/引用[...]" with your article part and link FOR reproducing or using the whole or any part of the content.