Like with all previous Serious Sam games, you should play the full campaign in co-op mode with friends. Only then does it shine. I played split-screen (2 keyboards, 2 mice, 1 PC) with my bro. Compared to previous games, Sam3 may be too serious (Sam1 had the right balance of absurdity and seriousness, Sam2 was not serious enough). There is still the usual witty adolescent humour though (lame in a good way). I respect Croteam for still patching the game 2 years after release. Sadly, Sam3 feels a bit shorter than previous games. The end boss fight was too difficult and it was not always clear what you were supposed to do. Worth playing if you have some Co-op buddies.