Déjà Vu

Deja Vu was an event that occurred on July 13 at some point during 19XX, where Big Boss infiltrated a prison facility in Cuba with something seeming oddly familiar about it.

After locating and recreating the seven images (collecting an item among searchlights; seeing a chopper; having [[Psycho Mantis|a gas-masked man appear after shutting off the power; blowing up an APC while a soldier was inside it with grenades; driving a jeep around the base; locating a surveillance camera; and finding a Moai statue), Big Boss managed to escape via a vent. Big Boss upon escaping then ended up having to take a quiz.

Behind the scenes
Deja Vu is the extra ops mission for the PlayStation 3/PlayStation 4 versions of Metal Gear Solid V: Ground Zeroes, unlockable by collecting XOF patches.

Besides the aforementioned scenes that the player has to recreate, there were several other references to Metal Gear Solid in the game:


 * Attempting to rescue the prisoners at Camp Omega and the boiler room in the admin building will result in the prisoners standing up and then collapsing dead to the ground after shouting "FOXDIE!" Upon finding both prisoners, Big Boss will end up "infected" with FOXDIE, causing the screen to glitch up and give off several psychedelic colorings before being "rebooted" by the Fox Engine.
 * Kazuhira Miller will comment on Shadow Moses Island's existence before laughing and saying "...or not."
 * Nearing the end, Miller will comment that Big Boss was nearing his goal, with Big Boss asking "Master" if he's all right.
 * The "quiz" segment has various characters (including Roy Campbell, Liquid Snake, Revolver Ocelot, and Solid Snake) uttering quotes from the game, either direct quotes or paraphrases to fit the context.
 * The "post-credits" segment has the Metal Gear Solid title.

The endgame quiz has ten questions (not counting finishing Liquid's "FOX... DIE...!" line) that tested the player on their knowledge of the original Metal Gear Solid from 1998.