Serious Sam: Double D Demo Is Now Available On Steam

Mommy’s Best Games and Croteam announced today that Serious Sam: Double D’s demo is now available on Steam and can be downloaded from here. Serious Sam: Double D is the first game in the Serious Sam Indie Series and is available now for download at a super serious $7.99 price through Steam, Get Games, Impulse, and Direct2Drive.
Here is also a somehow old trailer of Serious Sam: Double D to get an idea of what this game is all about.
Serious Sam Double D - The Gunstacker