We would rather you didn't make a subpage, but a full work page of its own.
Our house style requires all work pages be top-level pages in the Main namespace. We are, in fact, engaged in a long-term project to fix all the things we inherited from TVT where the works in a franchise were hung off a central page (Harry Potter took a month or so to clean up; Discworld is still being worked on, and The Hitchhiker's Guide to the Galaxy is queued up after that); we kinda don't want anyone to create new cases that will need fixing.
I've approved your edit to Transport Tycoon as-is, but please correct the links you added for OpenTTD when you start work on the page.
-- Looney Toons, admin
@Labster @Looney Toons @GethN7 @Robkelk @QuestionableSanity @Derivative @SelfCloak