During the Credits
There is extra audio during the credits of Metal Gear Solid V: Ground Zeroes.
The audio is of prior to Big Boss’ arrival at Camp Omega. Paz can be heard being interrogated by Skull Face demanding the whereabouts of Cipher, also known as Major Zero. Paz eventually gives in and is about to tell him Zero’s location before the scene ends.
After the Credits
After the credits of Metal Gear Solid V: Ground Zeroes end, there is a final message saying “To be continued in THE PHANTOM PAIN.”
There is then a final score card giving the player their statistics for beating the game along with a trailer that’s very similar to the original Phantom Pain reveal trailer and again teases the full game, Metal Gear Solid V: The Phantom Pain.