Metal Gear Solid Delta is packed with clever easter eggs and references to other Konami games and the Metal Gear universe.
- The Nightmare Sequence: After being captured in Groznyj Grad, if you save and reload your game, you can experience a bizarre nightmare sequence featuring various Konami characters and bosses.
- The Ape Escape Minigame: During the Virtuous Mission, if you find and shoot all the Ape Escape monkeys, you can unlock a special minigame.
- The 'Snake Eater' Theme Song: Calling certain radio frequencies at specific times can play the iconic theme song.
- The Ocelot Youth: Pay attention to Ocelot's mannerisms and dialogue; they foreshadow his future role in the Metal Gear saga.
- The Cardboard Box Fast Travel: In certain areas, if you hide in a cardboard box and are picked up by a truck, you can fast travel to other truck destinations.
