Valve’s Portal series, and its protagonist GLaDOS, are among the most popular games of the last decade. To bring fans closer to the Portal world, Valve asked Catalyst to create merchandise that extended the play experience beyond the game. We created the ”lemon grenade mug” to much acclaim, inspired by Cave Johnson’s famous quote from the game itself: “Make life rue the day it thought it could give Cave Johnson lemons. Do you know who I am? I’m the man who’s gonna burn your house down! With the lemons! I’m going to get my engineers to invent a combustible lemon that burns your house down!” The mug was a huge hit.