Valve has hired the student development team from DigiPen behind Tag: The Power of Paint, described as: "a first-person platformer created by seven RTIS and BFA students at DigiPen, was chosen from ten IGF Student Showcase Finalists as winner of the Best Student Game Award." This is noted on Shacknews where they make the case that this team will contribute to Portal 2 based on how Tag allows "the player to manipulate the physical attributes of the game's environment using different colors of paint," which sounds quite similar to word from a Game Informer Portal 2 preview that says the game will feature "special paint that gives unique physical properties to surfaces." It would be appropriate to hire a student team from DigiPen for Portal 2, considering how the original Portal was a DigiPen student project known as Narbacular Drop before Valve hired the team behind that.