Brenda Laurel's Computers as Theater revolutionized the field of human-computer interaction, offering ideas that inspired generations of interface and interaction designers-and continue to inspire them. Laurel's insight was that effective interface design, like effective drama, must engage the user directly in an experience involving both thought and emotion. Her practical conclusion was that a user's enjoyment must be a paramount design consideration, and this demands a deep awareness of dramatic theory and technique, both ancient and modern.