Upon entering the Lighthouse, you will experience the final, most profound sequence of the game. The light anomalies will coalesce into a singular, overwhelming event, revealing the true nature of the 'Pattern' and the fate of Yaughton's inhabitants. This is where all the individual stories and scientific theories come together.
There are no further interactions required at this point; simply witness the unfolding events. The ending is open to interpretation, but the narrative provides enough context for a comprehensive understanding of what transpired. Allow yourself to be immersed in the visual and auditory experience, as it delivers the emotional climax of the game.