Listen to the sound clip Initiating initialization sequence...initializing... Greetings and salutations, esteemed guests and test subjects. Welcome to the Aperture Science Enrichment Center. Our team of dedicated scientists and engineers has worked tirelessly to create a series of challenging and innovative test chambers for your enjoyment and edification. In the spirit of scientific inquiry, please proceed through the chambers with a sense of curiosity and a willingness to learn. Remember, the key to success is... from Announcer (Portal 2) (Game, Portal) HiFi TTS Computer AI Voice: