Starle is Castle inverted: instead of naming a film from its cast, you name an actor from their films. The mystery star's filmography is revealed one movie at a time — starting with the least famous of their notable films and building to their biggest hit.
The daily mystery star is the same worldwide. Free Play deals unlimited actors, and Eras mode draws the mystery star from a chosen decade's leading names — the 1960s roster plays very differently from the 2020s one.
The first film is deliberately the deep cut, so don't chase it too hard — hold it in mind as a filter instead. The real information is in the intersection: with each reveal, ask who was top-billed in all of these. Genre and era consistency narrow things fast; an actor whose reveals hop from indie drama to superhero tentpole is telling you about a specific kind of career. And the ordering itself is a clue — if a film you consider iconic appears early, the star must have even bigger hits still hidden.