Cassette Tapes and XOF Patches are two collectibles featured in Metal Gear Solid: Ground Zeroes. There are nine XOF Patches hidden in the game and finding them all will net you Insignia Trophy/Achievement.
Furthermore, finding all XOF Patches also unlocks a bonus mission called Deja Vu on Playstation 3 and Playstation 4. Whereas, the Xbox One and Xbox 360 versions get Jamais Vu bonus mission.
Metal Gear Solid V: Ground Zeroes XOF Patches Locations
XOF Patch #1
Location: Just as the mission starts, turn around and the XOF Patch will be lying at the very edge of the cliff.
XOF Patch #2
Location: After collecting the previous patch, head inside the base and get rid of enemies in any way you like. After doing so, drop down on the left side to find it near some wooden planks and a red/white barrel.
XOF Patch #3
Location: This patch is located on top of a generator in a fenced area. You will come across three large white generators in a fenced area. Pick the lock and climb over the generator to spot it.
XOF Patch #4
Location: You will see a prison in the southeast part of the map. Head there and look for it on top of a small guard outpost.
XOF Patch #5
Location: In order to get inside the prison, you must pick the door lock. Do it and look down to find it in plain sight.
XOF Patch #6
Location: At the very centre of the base, you will come across a watchtower near a small puddle. Scout the area for the next XOF Patch.
XOF Patch #7
Location: The next XOF Patch is located inside a small vent just a small way past the previous XOF Patch. You will hear the dialogue, ‘You might be able to crawl in there’ near its location. There will also be tank and movable elevator in the close vicinity.
XOF Patch #8
Location: After entering the inner base via red door, you will come across a guard and a CCTV Camera. Once you are inside, hop over a small white generator to find this patch.
XOF Patch #9
Location: All you need to do to obtain this XOF Patch is to roll over the ground until you trigger a cutscene.
If you need any further help in finding any of these patches, comment below and we will get back to you!