Can you distil the essence of an Arkham Files game to one sentence?

By ArkhamChronicle, in Arkham Horror: Final Hour

Or maybe a paragraph?

Is there a single definition that applies to all of the tabletop games released so far?

Each of them has you playing a single investigator against the Lovecraftian Mythos.

They are all co-operative games.

In all of them you visit different locations.

Each has damage and horror (right?)

We are interested in finding a taxonomy that you could apply to judging an unknown future game.

And we are just looking at the tabletop games.

Sorry for the duplicate posts but we want to try and reach everyone. We might put your definition in a YouTube video if that’s OK.