A lot of gameplay in Metal Gear Solid V: The Phantom Pain will be centered around Mother Base, the player-owned center of operations where the upgrading gets done, all the extra resources get shipped to, and where your mercenary army hangs out when not in the field.
The latest video released by Konami shows many of these features, from research and development of new gadgets and weapons to creating Forward Operating Bases in order to access online invasion gameplay modes. Also, there's a new trailer for the game from Gamescom which focuses more on the story. You can check out both videos below.
MGS V: The Phantom Pain comes out on PC, PS3, PS4, Xbox 360 and Xbox One on September 1 worldwide.