An Official DLC Reveal Trailer offers a first look at The Order of Giants, a new add-on for Indiana Jones and the Great Circle coming to the archeological action/adventure on September 4th. The Steam Listing is live, offering a complete description. This will update the game with an all-new adventure that roams to Rome and introduces new threats. As the title suggests, they might be giants:

There is a myth of a beast in the hidden depths of Rome, rumored to guard a terrible secret. Indiana Jones and the Great Circle: The Order of Giants™ DLC is an all-new story chapter that takes Indiana Jones to the ancient streets of Rome where forgotten catacombs twist into something far more sinister. Indy must outwit a dangerous cult and decipher intricate puzzles designed by emperors to uncover the dark legacy of the Nephilim giants.

When Indiana Jones encounters Father Ricci, a young priest desperate for help to track down a Roman artifact, a standard treasure hunt soon turns into a perilous journey. Along the way Indy must face the sinister plots of Emperor Nero and his gladiator games, the enigmatic Cult of Mithras, and whatever else lurks in the shadows. Can Father Ricci's cryptic knowledge guide Indy through these treacherous passageways? Only Indiana Jones can piece together this breathtaking mystery.

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. 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.

The secretive, centuries old Cultists of Mithras are everywhere, striking from the shadows. Their dark red robes reflect the blood oaths to their cause, and they’re willing to kill or die to protect the ancient power they serve.