Zathura: A Space Adventure

Two squabbling brothers are propelled into deepest, darkest space while playing a mysterious game they discovered in the basement of their old house. On their fantastic journey, they are joined by a stranded astronaut and must survive meteor showers, hostile lizard-like aliens, a rocket-propelled robot run amok and an intergalactic spaceship battle. Unless they finish the game and reach the planet Zathura, they could be trapped in outer space forever.