One of the biggest additions for the Serious sequel is something that's become commonplace in many shooters: vehicles. And while there will be some predictable mounts like APCs and and turrets, there are more unique vehicles like the Serious surfboard and hoversaucers. The one that looks the most fun, however, is both a vehicle and a weapon: the rollerball. Looking like something out of American Gladiators, it's a large spiked ball that Sam can climb in and push along from the inside, trampling enemies three times his size as he rolls along.