The setting is totally different though, offering a steampunk vision of a medieval city. The protagonist eventually falls into a house after being tagged with an arrow and meets a shady side character, before Prophecy shows off what looks to be its defining graphical feature - a special powder used by the protagonist to burn through metal armour and iron grates. The demo ends with Abel donning the armour of the city's captors, reflecting on how he needs to find the chamber before they do.
As well as the video, you can also check out some renders of the game's main protagonist and enemies, posted to ResetEra by user Oozer. According to Oozer, the game's files suggest the main character was called Abel, and the name and data tied to the vertical slice file suggest it was made (or first hosted) around five years ago, in 2015 or 2016.
As we reported last week, Ghost of Tsushima could have been a game about Pirates, Rob Roy or the Three Musketeers - the development team toyed with a number of ideas before settling on the Mongol invasion of Tsushima. Perhaps Prophecy was one of them? Jordan Oloman is a freelance writer for IGN. Follow him on Twitter.