The Civ series demands an honourable mention for having proper manuals. Sure, it wasn't entertaining like the TF2 announcements but they were well written, accurate and complete, with a good amount of tips yet somehow not spoiling it. I remember buying Civ IV and actually enjoying reading the manual on the train home.
(NB: they tend to include proper manuals on release and then just include a .pdf on the cheap versions, fair enough).