Sorry for the inconvenience. Known Navigation header breakage of “Previous:” and “Next:” links, the Table Of Contents may be the solution for those.
However, unfortunately, the Table of contents may also be broken, and there may be other unforeseen breakage primarily in the handbook portion of the wiki.
Presently the 10.1 Table Of Contents is being "reconstructed" becoming incrementally fixed while the other handbook versions may have various breakage.
(Sorry for the inconvenience)
Note: the Gnibbels and Lights Off games require 3D acceleration. If your video driver does not support this, these games will not work.