I was going to have this thread be as a question to the development team on whether we can expect any cameo's in Quest for Infamy, be they other adventure game heroes or famous tv shows/books/etc characters. But then I realised that they would not answer that since the whole point of a cameo is that we are surprised when it appears.
So instead, how about this be what is some of your favourite cameos in games (doesn't have to be limited to adventure games)? At the moment for me, I can only think of two. In the Wolverine Origin's game, I remember coming across the hatch from Lost and Frostmore, which was really cool. And though I cannot remember where, I do remember seeing the TARDIS in an adventure game.
So what about you lot?