I'll take that as a guess at Discworld 2, Cassiebsg? If so, you are correct! In one of Rincewind's journeys through a portal, he accidentally ends up in the first game for a short cutscene!
(I was considering taking a screen-grab from before the newer Rincewind shows up, to be more difficult, but decided that was too unfair!)
(I was considering taking a screen-grab from before the newer Rincewind shows up, to be more difficult, but decided that was too unfair!)