Space Quest IV, Roger brings the cigar stump from the mall, and
after using it in the Super Computer in SQ12, he DISCARDS it, and
does not go back to pick it up after rescuing Roger Jr. But in Space
Quest 6, it is lying on the table in Roger's room as a souvenir.
you're in the Holocabana for Stellar's funeral the chaplain is described
as a "holo-chaplain", which means he must be a hologram.
However, he leaves through the pneumatic transport system. If he
was a hologram, he wouldn't be able to leave the confines of the
room. Also, looking at the chaplain outputs: "Stunningly real,
don't you think?".
the opening sequence Admiral Toolman states: "However,
due to your successful return of the SCS Eureka, your rescue
Goliath's crew..." Any SQ5-player would know that Roger blows
up the SCS Eureka at the end of SQ5 and returns with the SCS Goliath!
offers Jebba the Hop a "free plunge job, day or night".
But when trying to take the Autobucks-card in Roger's quarters,
you're told that "you have no need for money aboard the DeepShip,
Autobucks ATM-card was found in the future of Space Quest 10 in
the Galaxy Galleria, where it is fully functional (Roger uses the
money from the card to purchase a dress). However, in the present
of Space Quest 6, the card is expired.
disappears physically into the metaphysical cyber universe and
when he comes back, he can bring a cyber object
with him (namely the plank). Isn't that a bit too unreal, even for
Space Quest? Imagine programming a few buckazoids for yourself!