Continuing the tradition of the first
Serious Sam, there's plenty of humor abounding in
Serious Sam: Double D. There are references to other games, and then there are just silly situational humorous bits. At one point, Sam is reminiscing about a nice athletic girl he knew with a nice pair of ... handguns. There are poop references, silly explosion humor and really silly flirting humor. You can even turn the blood effects into donuts instead of blood splatters. It's pretty lighthearted, very juvenile fun. If you still need a feel for the game's vibe, check out the video on the Steam Store site in the links below.
Of course, the ridiculous gun-stacker ability is a big, hilarious new thing for Serious Sam. The stack can get pretty tall. If you can't decide between rocket launcher, shotgun or machine gun, then go for it. You can set up different stacker combinations to your heart's desire. The problem with all this is that you still spend all that ammo. Stacking guns is not all that efficient.
There are the usual crazy enemies like chimps in hoverboots, headless guys running and screaming with cartoon bombs in their hands. Oh yes, and there are stacks of pancakes with vuvuzelas stuck in them. I really think I can call it a night right there.
The secret area traditions of the earliest first person shooters are given a nod in this game as well. I haven't seen a "Secret Gay Wedding" yet, but time for that humor has pretty much passed anyway. Surprises still abound, but mostly in the writing of the dialogue and the, well, endless enemy ambushes. These situations still do get a little creative though. There's one point where you're given a candy trail of sorts with vitamin pack power-ups. You get one, and another one pops up in front of you. You pick it up and another pops up, then another. You get your confidence up and bam! It's the perfect, hilarious enemy ambush.