You want more Indy, you got more Indy—or at least you'll get it in September with the release of first DLC, The Order of Giants.
Anyway, they're not the dangerous cult in question. That would in fact be the Cultists of Mithras: They're everywhere, they strike from the shadows, their dark red robes reflect their blood oaths to the cause they're willing to kill and die for—about what you'd expect from an evil cult, really.
"Danger awaits as The Order of Giants takes Indiana Jones beyond the walls of Vatican City and into a brand new open-area map in the bustling city of Rome," says excitedly. "Adventure through the crumbling ruins of the Colosseum to the pristine Vatican Gardens. The mystery will also take you into Rome’s ancient sewer system, the Cloaca Maxima, and deeper below ground to foreboding crypts."
And yes, there is a Steam page, and also a release date. Indiana Jones and the Great Circle: The Order [[link]] of Giants will be out on September 4, and will set you back $35/£31/€35. If you haven't yet purchased the game and want the whole thing, you're really better off buying the , which includes the DLC (the DLC purchase link is in fact just an upgrade from the standard to the premium edition) and goes for [[link]] $30, $5 cheaper than the upgrade.