“I've got a PowerPoint deck that I use for internal presentations, and there's a slide on it that asks, 'What percentage of your game is combat versus exploration versus puzzle solving versus platforming,' and I refuse to answer that question.”

Warren Spector is an American retired role-playing and video game designer, director, writer, producer, and production designer. He is known for shaping immersive sim games and for his work on influential titles such as Deus Ex. His games are built around player choice, with consequences that carry forward in the game world. At Looking Glass Studios, he helped create Ultima Underworld, Ultima Underworld II, System Shock, and Thief: The Dark Project, and Deus Ex became his best-known work for blending first-person shooter, role-playing, and adventure elements.