At QuakeCon last year, Bethesda announced that development studio Arkane had been acquired by the company, and we were promised to hear more about the studio’s first game soon. Just under a year later, we now know what it is.

Bethesda formally announced the studio’s debut title, Dishonored , earlier this morning by way of Game Informer . Dishonored is in development by Arkane Studios, including such minds as Harvey Smith (Deus Ex) and Viktor Antonov (Half-Life 2).

According to the publication, the title is a first-person stealth / action adventure game. Assassination will play a key role in the game, with players “[slipping] in and out of a fortified barracks with nobody ever knowing you were there.” Player choice and morality is said to play a big part in the game as well.

Dishonored is in the works for the Xbox 360, PlayStation 3 and PC, and is due out on all three platforms sometime in 2012. Check out Game Informer’s August issue for more details.