From the Publisher:

In the far, uncharted reaches of the Earth, there dwell unspeakable things— ancient nameless beings whose very existence tear at the fabric of reality. But there are those who would stand against such horrors for the good of all humanity...or perhaps for a quick profit.

This expansion introduces five new investigators and a wealth of new player cards and customization options to the game, including new multi-class cards. Stand toe-to-toe with the toughest of foes as the mechanic, Daniela Reyes; read the stars as the astronomer, Norman Withers; seek out a fortune as the archaeologist, Monterey Jack; fulfill an ultimate destiny as the martial artist, Lily Chen; and wheel and deal as the salesman, Bob Jenkins.

The Edge of the Earth investigator expansion can be used to build or enhance investigator decks for any Arkham Horror: The Card Game scenario or campaign.