Gameplay-wise, this is the same Serious Sam you've come to expect. It's the art direction and the tone that sets this game apart from the other entries in the series. It's as if everyone at Croteam had a goal to make the most ridiculous game they could, and they succeeded. That doesn't mean the game is bad - far from it. It's a lot of fun in co-op, and the crazy art direction and tone really suits the game. It's the odd one out in the series, but I'd recommend checking it out. I'd recommend enabling combo weapons and sprinting, since they are disabled by default for some reason.