Bethesda has announced Wolfenstein: The Old Blood, a standalone prequel to Machine Games' first-person shooter Wolfenstein: The New Order.

It's out 5th May 2015 digitally and in boxed form for PlayStation 4 and PC, and digital only for Xbox One, priced £14.99. There's no mention of PS3 and Xbox 360. You don't need Wolfenstein: The New Order to play.

Here's the set-up:

The year is 1946 and the Nazis are on the brink of winning World War 2. In an effort to turn the tide in the Allies' favour, B.J. Blazkowicz must embark on an epic, two-part mission deep within Bavaria. Part one of Wolfenstein: The Old Blood - Rudi Jäger and the Den of Wolves - pits B.J. Blazkowicz against a maniacal prison warden as he breaks into Castle Wolfenstein in an attempt to steal the coordinates to General Deathshead's compound. In part two - The Dark Secrets of Helga Von Schabbs - our hero's search for the coordinates leads him to the city of Wulfburg where an obsessed Nazi archaeologist is exhuming mysterious artefacts that threaten to unleash a dark and ancient power.

The trailer, below, shows off Wolfenstein: The Old Blood gameplay, some new weapons and enemies. Expect more from PAX East this weekend.