There are 9 X.O.F. Patches that you can find in Ground Zeroes. There is no specific order to collecting the patches, they are all available for pickup once you gain control of Big Boss / Snake.
- At the edge of the cliff near the mission’s insertion point. Turn around over your left shoulder and walk to the edge to find it.
- Atop the pile of garbage on the south side of the West Refugee Camp, just north of the small shack by the wall.
- On top of the left power transformer at the north end of the Warehouse area.
- On top of the guard house across from the Prison Camp
- Just inside the gate of the Prison Camp.
- In the center of the Helipad area (south of the orange flag), in the middle of all four landing pads.
- In the drainage channel on the north wall of the Helipad.
- On top of the air vent in the east wing of the Administration building (through the orange door outside the main gate).
- Stuck in Snake’s pack. Roll back and forth on the ground to retrieve it