Fort Zancudo UFO Easter Egg
As with the other UFO sightings, you need 100% game completion before they’ll appear. To see the Fort Zancudo UFO in GTA 5, you’re going to need a helicopter and a parachute. Fly your helicopter above Fort Zancudo, then jump out with your parachute when you see the UFO. But you won’t be able to land on it, as it seems to have some sort of force field.