October Spooky Game Marathon - 50 Clues / Maria / Part 2 / Secret of the Mark

About 50 Clues: The Secret of the Mark, from BoardGameGeek:

In an unknown place, children are trapped in the dark. Their abductor is dead, and you need to find the hiding place and save the children before it is too late. "The Secret of the Mark" is the second part of the Hunt for Maria trilogy. 50 Clues® is an immersive puzzle game that offers the experience of an escape room, but in a format that can be played at home. -description from publisher