The gates of hell have opened: Downton Abbey mobile game announced by Activision

The gates of hell have swung open, the horsemen ride, and humanity cowers as the Earth withers and dies. The heavens crack with the roar of unimaginable pain and suffering as the oceans boil and all is rendered unto dust.

Activision has announced a free-to-play mobile game based on ITV drama Downton Abbey. Called Mysteries of the Manor, the title is a "hidden object game" which casts players as men and women hired by the Earl of Grantham to search for missing items and return them to their owners.

The game is available now via the iTunes App Store, Google Play Store, and Amazon Appstore, and arrives ahead of the sixth and final season of the award-winning show, which airs from 20 September on ITV.

The press release reads: "Downton Abbey: Mysteries of the Manor is an adventure of exploration and discovery, featuring characters and locations from the series. When an unknown intruder ransacks the mansion, putting the Crawley family's fortune in jeopardy, players must discreetly search every room to find the missing treasures and unravel the mystery behind the break-in. But in a place where everyone has something to hide, no one is above suspicion."

Microtransactions in Mysteries of the Manor are as awful as you would expect, charging between £1.49 and £79.99 for in-game currencies diamonds and shillings, as discovered by Eurogamer.

A trailer for the game was also released and can be watched below.