Welcome to Aperture Laboratories, where we develop and holistically test... holes! We've prepared the most technologically advanced holes, and we need you to test them! We're 97% sure they're safe, so if we round that number, they're 100% safe! The Aperture Elevator™ will remember which chambers you have completed and take you to the correct floor upon deat—we mean, an unsatisfactory test result. Delicious and edible cake is awarded only to the best testers, so good luck!