When the Doctor arrived you know some real weird shit is going down.
There is a lot of truth in that one statement!
The Shadow World blog has a very opinionated set of Doctor Who roleplaying notes using the Xpress System by Postmortem Studios. Shadow World is a series of games that parody the "World O' Darkness" genre written by Ian Warner. There are no sacred cows in this Doctor Who adaptation, and you may see a favorite Doctor or companion skewered, but it's still fun.