If you want to know more about one of the most pleasant surprise announcements of GDC (assuming the word 'pleasant' can be applied to a game about killing Nazis), Bethesda has a stream for you. Two streams, actually, both of which are coming in direct from PAX East via Twitch's official channel.
Bethesda and Twitch will stream new gameplay for Wolfenstein: The Old Blood on March 6 and 7, starting at 7:30 am PT / 3:30 pm UK time. You can catch it on the Twitch channel embedded below. Or if you happen to come in late, you can always stick around for some of the many other demos Twitch has planned, including a look at Gigantic and Hotline Miami 2. Check its official page for the full schedule.
The Old Blood is a standalone prequel to Wolfenstein: The New Order, following BJ Blazkowicz's increasingly desperate efforts to halt the tech-enhanced Nazi war machine before it conquers the world. Spoiler: he doesn't halt the tech-enhanced Nazi war machine.
But it sounds like getting to Deathshead's compound, as depicted in the first mission of The New Order, is a pretty interesting story all its own. You'll be able to see for yourself when The Old Blood releases on May 5 for $19.99/£14.99.