"We shall see that at which dogs howl in the dark, and that at which cats prick up their ears after midnight. We shall see these things, and other things which no breathing creature has yet seen. We shall overleap time, space, and dimensions."
     –H.P. Lovecraft, From Beyond

By the time your pursuit of two missing professors leads you to the scenario from Undimensioned and Unseen, you'll have traveled far from the familiar comforts of Arkham, and you'll have witnessed things you know no one would ever believe. You'll find yourself neck-deep in furtive cultists and their sacrifices, inundated with information about "Ancient Ones" and unholy rituals. And you'll suddenly find yourself forced to destroy terrifying, monstrous creatures that are literally impervious to everything in your arsenal…

A mystery within a mystery, Undimensioned and Unseen may bring you another step closer to your ultimate goal, but you must first track down whatever knowledge or power may allow you to defeat a number of otherwise invulnerable Abominations. And it demands that you complete your investigation quickly—possibly by making use of the Mythos Pack’s new player cards—lest you should no longer be the hunter, but the hunted!

This is not a standalone product. It requires the Arkham Horror: The Card Game Core Set and The Dunwich Legacy deluxe expansion to play.