Mr. Y is a mysterious and unseen character in the Gman Squad series of machinimas and improvised skits. Although he has appeared only once, his message weaves a storyline that lasts for three episodes. He is also the second of the three mysterious identities in the series. He is also responsible for placing the fate on the world on Gordon Freeman in the episode Science, however, with the latter killed by the Gman Squad, he is annoyed to the point of swearing an expletive.