Egypt

Egypt, officially the Arab Republic of Egypt, was a pre-War country located in Africa.

Fallout 2

 * The Great Ananias claims that he has a genuine Egyptian mummy, though it's actually Woody, a ghoul from Gecko, who has a tendency to fall asleep in unusual places.
 * A crier in The Den will mention the Nile River, which runs through the country.

Fallout 3
The Nile River is again mentioned on a terminal in the Underworld.

Fallout 4

 * Lorenzo Cabot hires a team of experienced Egyptian excavators to help him find the lost city of Ubar.
 * Jack Cabot mentions Egypt among the other cradles of civilization, Sumer and Assyria.

Far Harbor
Gilda Broscoe and Keith McKinney starred in a film called Empire on the Nile. It was set in ancient Egypt, and the last Egyptian queen Cleopatra was a character.

Fallout 76
In the Mistress of Mystery television show, the titular character travels to Egypt twice, the second to vanquish the cult of the Unseen Seer.

Wild Appalachia

 * Egypt is mentioned in the Pioneer Scout camp terminal entries.
 * The famous pharaoh Tutankhamen is mentioned in the Pioneer Scouts archaeologist exam.

Appearances
Egypt is mentioned in Fallout 2, Fallout 4, and Fallout 76 and its Wild Appalachia update.