2) #4 (September 2006). Art by Lee Bermejo. Publication information Publisher DC Comics First appearance Action Comics #598 (March 1988) Created by Paul Kupperberg Steve Erwin In-story information Type of organization Intelligence agency Base(s) Konig Industries, Shelby, Virginia; NORAD facility in the Colorado Rocky Mountains; "The Castle" compound in the Swiss Alps Roster See: List of Checkmate members