Greg Costikyan

Greg Costikyan, sometimes known under the pseudonym "Designer X", is an American game designer and science fiction writer. Costikyan's career spans nearly all extant genres of gaming, including hex-based wargames, role-playing games, boardgames, card games, computer games, online games and mobile games. Several of his games have won Origins Awards. He co-founded Manifesto Games, now out of business, with Johnny Wilson in 2005.

Costikyan lives in New York City near his three daughters and is a 1982 graduate (B.S.) of Brown University. He is a frequent speaker at game industry events including the Game Developers Conference and E³.