Have you got what it takes to keep Dennis and Walter from erasing each other from history? It's a week night and you have a sleepover round Dennis's house! It's going to be EPIC! ... Is what you thought before Dennis pulled a prank that shut the school down and you were forced to go to work with his parents. BORING! ... Is what you thought before you, Dennis, Gnasher and Walter got sucked into a time machine that sent you back in time to when their parents were your age! AWESOME! ... Is what you thought before Dennis and Walter messed with the timeline and started disappearing. Can you make the right decisions and get history back on track before it's too late? Find out in this pick your own story, where YOU are the main character!