This is the worst game in the series.
OMFG Co-op in this Game Fucking sucks I have never been in a game that lags this much, and there is nothing wrong with the connection ether pc because no other game has this problem but SS2 also have all the glitches and other Fuck up stuff this is the worst game in the series I have not tried Serious Sam 3 yet, but it can't be this bad.