No, that's not Raiden. It's a "ninja" in Fallout 3's upcoming downloadable content, Operation Anchorage. Back to the tradition of 3's, here are three new Operation Anchorage screenshots released from Bethesda Softworks today.
Check out the 3 latest Fallout 3 Operation Anchorage here, titled "Water", "Base" and NINJA! The new Fallout 3 Operation Anchorage content is the first expansion mission DLC for Fallout 3, coming January 2009.