Warren Spector (born October 2, 1955) is an American role-playing and video game designer. He is known for creating games which give players a wide variety of choices in how to progress. Consequences of those choices are then shown in the simulated game world in subsequent levels or missions. He is best known for the critically acclaimed video game Deus Ex that embodies the choice and consequence philosophy while bringing together elements of the video game genres first person shooter, role playing game and adventure.