If you want to upgrade Mother Base in Metal Gear Solid 5 The Phantom Pain then there are a lot of systems to learn. From resources to gather, to construction priorities and more - there's a deep military base management sim to master here, on top of all the intense free-form stealth-action. You are a literal boss as much a legendary one after all, so there's a lot to manage through your trusty iDroid as you jet around the world being all gruff and heroic in Metal Gear Solid 5. If you're wondering what to focus on, or how to find enough materials to expand Mother Base, read on and we'll help you reach your full building potential in no time.