Microsoft recently filed for the registration of the trademark "Eden Falls,"  which actually is the name of a game in development at the Finnish studio Brimstone Interactive.

The title even has a homepage and a blog, but they have been inactive for a while, probably indicating that the house of Xbox picked up the publishing rights. Microsft's own mobile-focused Lift London studio seems to be involved as well now, as shown by a link on the game's Twitter account.

Reading the old FAQ, Eden Falls is described as a single player sci-fi/cyberpunk turn-based RPG to be released on mobile and tablets this fall, and then on PC at a later date.

Interestingly enough, the game seems to be quite dark in its themes:

Eden Falls will deal with some heavy topics and is thus targeted towards a mature, adult audience. Sex, drugs and violence will all play their part through out the story.

Below you can see a gallery of artwork of the game, even if it's labeled as "old" on the website, so it could be outdated.