Short version: 74%
Serious Sam Double D XXL is probably the best attempt at making a non-FPS Serious Sam video game by indie developers. The game offers Contra-like action-platforming with a plethora of weapons and a gun stacking system that helps you even more to slaughter your never-ending stream of baddies. The intentionally silly story may annoy you, but if you are the type of person who likes that kind of humour that is present in the trailers and promotional images, then this game will be a great source of entertainment for many hours.Long version:
Serious Sam is known mostly as an FPS series where you kill an absurd number of strange alien monsters in order to save humanity by kicking massive amounts (and massive sizes) of rear ends. Or other applicable body parts.
Serious Sam Double D (XXL) brings all that into 2D, or to be more precise, a Contra-like 2D action platformer shooter. The goal of the game is pretty much the same as in the main series: go from one end of the level to the other all the while hundreds if not thousands of enemies teleport in all around you and happily thrown themselves in the line of your bullets, rockets, chainsaws, plasma beams and everything else you can kill and maim with.
The game also includes a new type of weapon system called stacking, where you can sort of duck-tape two or more guns together to create one huge pile of murdering mayhem machine. This system is highly configurable. The XXL expansion also introduces weapon gadgets which all can add small additional functions to your guns. (These are purchasable in the shops, which are also new for the update.)
While the base games had a unique style of humour, they usually kept a somewhat serious tone with these wacky tidbits thrown in only as Easter eggs/secrets or some form of tension-releasing element. Double D doesn’t follow the same route, it’s all about tongue-in-cheek humour starting from the cutscenes to the level secrets or even the bosses, which are all the craziest things you can imagine: they start with a King Kong-sized ape with hover rocket nozzles as legs and a chainsaw arm… and this is probably the sanest of them.
Sadly, this humour, especially in the update, where they are fully voiced (they used Worms-like gibberish in the original) can be very tiresome after a while. The level design is also somewhat frustrating, more about insane jumps and running in a pseudo-maze than about providing some interesting ground to kill enemies. The aim system also suffers somewhat in the update with a forced aim assist that seems to be present in some way even when it’s turned off.
Still, apart from these mistakes and disadvantages, the game offers another– somewhat silly– Serious Sam adventure in the form of the campaign, and the combat system is interesting enough to keep you for the challenge levels too.