When first booting up Metal Gear Solid 5: The Phantom Pain, and after getting past the very strange prologue, players will uncover an open world unlike anything the series has seen before. In fact, the amount of possibilities Kojima Productions has put at gamers’ fingertips can be quite overwhelming at first, from completing Side Ops to extracting prisoners to managing Mother Base.

Eventually, though, players will get a hang of the systems in Metal Gear Solid 5, and it’s likely they will become engrossed by them. Developing new weapons, expanding Mother Base, and unlocking new gadgets soon become an obsession if players are not too careful, but fueling that obsession isn’t necessarily easy.

Although players will want to expand their Mother Base as quickly as possible, Metal Gear Solid 5 puts some harsh limitations on resources. Specifically, the game keeps Fuel Resources to a scarce minimum, meaning players will need to either scavenge a lot of them or wait until their Base Development facility collects enough to expand Mother Base.

Luckily, there’s a late-game trick for acquiring Fuel Resources in bulk that should push player’s Mother Base facilities over the edge. However, getting to the farming spot requires a little prep.

First, players will need to acquire the Wormhole Fulton upgrade, which uses teleportation instead of a balloon to extract soldiers, weapons, and resources. Doing so requires completing Side Op #50, ‘Capture the Legendary Jackal’, and having an R&D and Support level of 40 at Mother Base. After that, players can start development on the Wormhole Fulton for 850,000 GMP.

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Once players have the Wormhole Fulton, they will need to load up Episode 12 “Hellbound” from the mission select screen. This is the mission where Big Boss extracts Huey Emmerich from the Metal Gear development facility. Run to the area where the Metal Gear, Sahelanthropus, is being held and there should be some Fuel Resources crates located inside the facility. Without the Wormhole Fulton, players would be unable to extract the crates, but thanks to the magic of teleportation they can. So extract the resources, finish the mission, and then replay it as many times as you want.

Obviously, this farming trick isn’t going to be for everybody, as it doesn’t come into play until much later in Metal Gear Solid 5, but for those players who are going for 100% completion or the Platinum Trophy/1,000 GamerScore. There’s a lot to explore in Metal Gear Solid 5 beyond the main story, and many of the best secrets in the game require a lot of resources. So use this trick and rack in as many Fuel Resources as you want, and develop all of the coolest gadgets for Big Boss and his buddies.

Read our continued Metal Gear Solid 5 coverage:

Metal Gear Solid 5: The Phantom Pain is out now for PC PS3, PS4, Xbox 360, and Xbox One.