A simple game: the top level comment is somebody providing three to five movie titles with one actor in common. Then other people guess the actor.
An easy example: Raiders of the Lost Ark, Star Wars, Blade Runner (Harrison Ford).
A somewhat more difficult example: Beetlejuice, Heathers, Demolition Man (Glenn Shadix).
A very difficult example: Dad Savage, LA Story, The Kid Who Would Be King. I’ll let you work that one out on your own.