The next Fallout 3 downloadable episode coming to Xbox 360 and PC is entitled Mothership Zeta. You can already tell from the title that it's an alien-themed adventure but today Bethesda released some screenshots and extra information to fill in the considerable gaps in your knowledge.

First off, here's the information revealed from the fact sheet:

• Find and exploit new and destructive alien technology, like the Alien Atomizer and Drone Cannon.
• Explore the vast Mothership and learn the secrets of the Aliens’ master plan.
• Thwart the Aliens’ attempt to stop your escape, and take over the Alien ship before it wreaks havoc on the unsuspecting Earth below.
• Fight against the Alien Invaders, their robot drones, and turn their own horrible experiments against them.
• Ally yourself with an unexpected array of characters, both from the Capital Wasteland and from Earth’s past.

It's mentioned elsewhere on the fact sheet that you'll acquire new outfits like a Gemini-Era Spacesuit and Samurai Armor. Bethesda had previously revealed that you'll get extra ammunition for that stupidly overpowered Alien Blaster you've been carrying around, too.

Mothership Zeta will arrive on the 360 and PC on August 3rd. The first four screenshots are below.