The Sign Painter leaves many signs behind, which create most of the dialogue in the game. Some of the more well-known lines include: * “The last of the Goo Balls...” (seen in Regurgitation Pumping Station, Genetic Sorting Machine, Product Launcher, Deliverance, and Observatory Observation Station) * “We're all in it together” (seen in Regurgitation Pumping Station, The World of Goo Corporation Memorial and Recreational Center, and Infesty the Worm) * “You can't stop progress” (seen in You Have To Explode The Head and advertisements)