The Zorgons are an alien race of reptilian creatures and they are the main villains in the book and 2005 movie Zathura.
They were summoned by the game by Walter and Danny while continuing the game. They were first using energy cannons to attack the house while tracking them with a heat source, but the stranded astronaut, whom summoned later, removed and replaced the source and left them off course, but Lisa turn back the water heater returning them back to the house and invaded the house. Danny retrieved the game on the ground floor, but the zorgons noticed him. Walter used the robot from the attack to fight them and they retreated back to the ships.
They later returned to destroy the house with a large fleet, but Danny rolled onto Zathura and the fleet and the house were sucked into a black hole returning the house to earth.