During dinner, the family is euphoric with their new powers. However, it leads to an argument about what they should be doing with them. Aliens Kang and Kodos decide to strike Earth, and an alien invasion unfolds. Realizing none of their powers are strong enough to defeat the aliens, Bart and Lisa visit Professor Frink. They visit his house to find him not there, but they stumble upon a portal that sends them to a place called the game engine where all video games are made. After saving him from a giant gorilla (in a level similar to the 1981 "Donkey Kong" arcade game), Frink gives them "The Simpsons Game"s player's strategy guide to teach them how to better use their powers as well as gain new ones, and the Simpson family soon sets out to try and stop the alien invasion. First, Bart and Lisa assist Captain McCallister in fighting back mind-controlled dolphins that are attacking the city aquarium. Then, Bart and Homer defeat the Lard Lad statue which has come to life. Finally, they save the Springfield Mall and Cletus from an alien force led by Sideshow Bob.