History Fridge / ResidentEvil4

* Why doesn't Saddler kill Leon whenever he has the chance? It's because he knows Leon was infected with a Plagas and figured that even with Leon showing himself to be a clear threat to his plans, it wouldn't matter once the Plagas in him matured enough to where Saddler could take full control and that he had no idea Luis gave Leon suppressants to keep the Plagas in check. It isn't until he realizes Leon managed to cure himself in their final encounter that he decides to finally try to take Leon out personally.

** Or the joke could just be, you know, [[Franchise/MetalGear a snake in a box]].

* Why did the island explode at the end and how did Ada have the detonator to activate the bombs? Well, there is one person who is an explosives expert and was already demonstrated to have the skills to set up said explosives: Krauser, who rigged the tower with his final fight to Leon to explode. Since Krauser is undercover in Los Illuminados working for Wesker who plans to kill off Saddler once the sample is obtained, it was most certainly him who secretly planted the bombs around the island as he performed his otherwise normal duties for the cult. Ada either got the detonator from wherever he had it stashed offscreen or it was in the helicopter all along.

** With this in mind, it makes the island's self-destruct sequence in ''VideoGame/ResidentEvil4Remake'' an AdaptationInducedPlotHole since Krauser is fully loyal to Saddler and has no affiliation with Wesker in that continuity.

* In the remake Ashley is slower to trust Leon during their first meeting, running away from him even after he tells her that her father sent him to rescue her. This makes sense when you find the document in Krauser's camp outlining the kidnapping plan, as it reveals that Krauser and his accomplices had infiltrated her security detail. Ashley has already been betrayed by her father's people once, so of course she's going to be jumpy even around her supposed rescuer.

* The remake features a number of new files containing background lore:
** The Old Man's Journal and Village Records No. 1 tells the story of the Navarro Family, a grandfather and grandson who lived at the lake. The grandfather took the boy out hunting and told him stories of Don Quixote. One day, the grandfather was bitten by a wolf and became sick from his wound as his "body moves on its own" and he "can hear voices" from inside his head. Accepting his fate, he tells Bitores, "If anything happens, you know what to do." The villagers regrettably burn the grandfather to death in his cabin as his grandson watches in silence before [[ScrewThisImOuttaHere leaving the village completely]].
** Salazar's castle contains a number of notes that cover the history of the Salazar family and Ramon himself. For generations, the Salazars had managed to both seal away Las Plagas and expand their household, but all of their efforts eventually unraveled by the modern day. Ramon's mother, Catalina, had "invited the devil" into their home and Ramon himself descended into complete violent insanity as he pledged to released the Plagas by Saddler's orders.
-->"8th Gen. Count Ramon"
-->"His illness should have taken him."
** The island covers the research that went on behind the scenes of the game's events. Saddler had kidnapped scientists and forced them to create new, evolved stages of the Plagas. If they refused, they were injected with the initial strain of Plagas that would eventually become too simple-minded for any complex task. If they followed orders, they would be injected with the superior species as part of Saddler's end goal.

** The island covers the research that went on behind the scenes of the game's events. Saddler had kidnapped scientists and forced them to create new, evolved stages of the Plagas. If they refused, they were injected with the initial strain of Plagas that would eventually become "too simple-minded for any complex task". If they followed orders, they would be "rewarded" with the superior species as part of Saddler's end goal.

** Salazar's castle contains a number of notes that cover the history of the Salazar family and Ramon himself. For generations, the Salazars had