The word "mothership" refers to a large vehicle or spaceship that serves as a headquarters or base for a group of smaller vehicles or spaceships. It is like a home or main hub for these smaller vehicles or spaceships. Full definition
Team 17 along with a team of veteran game developers under the studio name of Mothership Entertainment, have announced Aven Colony for Xbox One. (xblafans.com)
I am disappointed that Bethesda decided to end the Fallout series with Mothership Zeta (which sucked!) (metacritic.com)
«We're thrilled to have the opportunity to partner with Team17 and bring Aven Colony to PS4 and Xbox One,» said Paul Tozour, founder of Mothership Entertainment. (avencolony.com)