Pac-Man was a simple man. Several pixels, a loving wife, a few good friends, but then he turned to drugs. Indeed, these "pellets," as they are called, warped Pac-Man. He distanced himself from his wife (who would eventually turn to pelleting, herself), he fought his friends' every attempt at intervention, and constructed sick, two-dimensional mazes to hide his goods. His friends, Inky, Pinky, Blink, and Meredith, discovered the drug hoardes and tried to put a stop to it, but that's when they discovered Pac-Man's true intentions. He was creating "power pellets," by giving pellets to pandas and forcing them to mate. No one is sure how this had any effect on the pellets.
Filth and half-eaten foods scattered the floors, and as the group adventured further, Pac-Man appeared. Pac-Man tried to destroy the evidence by going on a drug binge, but his friends tried to stop him. They would grab him, only for him to go into spasms on the floor wailing and making strange noises. He scrambled to his twisted and potent power pellets, and had the greatest high known to mankind. He went into a frenzy, eating Meredith. Inky, Pinky, and Blinky ran away, but Pac-Man hunted them down every last one of them and ate them.
Pac-Man managed to escape the death sentence by PETA's support, due to the amazing job he had done of repopulating the world's panda population.