Alien robots invade Knott's in shoot-em-up VR game. Your mission: Eliminate 'em all

I crouched behind a wooden barrel and blasted the alien robots emerging from the Knott's Berry Farm blacksmith shop with my six-shooter laser revolver. Just as I beat back the time-traveling horde, their extraterrestrial mothership landed in the middle of the Ghost Town section of the Buena Park theme park. Time to power up to rapid-fire mode and save the Wild West town from the relentless alien invasion. When the computer-generated simulated battle concluded, I pulled off my virtual reality headset and once again found myself in a dimly-lit 20-foot-square room, void of any frontier town or marauding robots. If the year-long test run proves successful, Knott's parent company Cedar Fair plans to expand the interactive experience to other locations in its 11-park chain.