At the beginning of The Phantom Pain, you are asked to enter your date of birth. While it doesn’t seem significant at the time, the game stores that information and treats you to an amusing scene when the special day rolls around. If you don’t want to wait (or mess with your system’s date settings), you can see the event play out right here.
The scene occurs after you’ve gained access to Mother Base. It might happen when you return to base on your own, or you might get a call from Miller directing you home after a mission. Either way, once you exit the helicopter, you witness the sequence depicted in the video below. Happy birthday, Boss!
For more about Metal Gear Solid V: The Phantom Pain, read our story primer and spoiler-free tips, or watch the game in action.