Check out our new Behind The Scenes trailer for Menace of the Underdark, the upcoming expansion for Dungeons and Dragons Online. This is the first installment in a series of videos in which we’ll take you behind the scenes to show you how the expansion is being made. Launching on June 25th, Menace of the Underdark is the first ever expansion for DDO. Dungeons & Dragons Online (DDO) i... more.