The chopper kicks up dust as it sets down. Through the haze of dirt and grit you make out El Cadron, a shabby, little Texas border town. It looks quiet enough. But folks have been disappearing. And as a tactical expert, you soon discover it's crawling with aliens disguised as humans. Welcome to Ground Zero Texas. Armed with four BattleCams outfitted with a particle beam that stuns the aliens (you can't kill them with traditional guns) and a RoverCam used to search out the Reticulan weapon stash, you're into a sci-fi, wild west gun fest. Once the aliens know you've discovered their arsenal, it's all-out war and they come at you like robot stormtroopers. Lucky for you, every time you score a direct hit, their green goopy guts go flying!