Serious Sam: Double D (Spot the innuendo!) will be arriving next month as the second installment in the ongoing Serious Sam Indie Series. With the impending release, developer Mommy's Best Games released the game's first gameplay trailer, along with new screenshots. Yeah, they pretty much have the best company name ever -- and their logo is a pie.
You won't find a shortage of ridiculously huge monsters here, but they go pretty well with the game's Gun Stacker mechanic, which lets you stack weapons for more combined damage. Actually, the trailer and this screenshot explain the Gun Stacker feature better than words.