Here is a review of , which is the most current and relevant title, with a specific focus on the lore and world-building (the "Codex" elements) that fans often seek out.
"A mysterious arms dealer found in isolated locations. He seems to know about the Plagas but refuses to discuss his past. He accepts 'Pesetas'—an old currency—suggesting he has been operating in this region for decades." resident evil 4 codex
Entry: "The Merchant - Unknown Affiliation" Here is a review of , which is
Director Shinji Mikami faced a unique challenge. The narrative had to escalate from a rural European village to a military island fortress, involving a cult (Los Illuminados), a parasitic bioweapon (Las Plagas), and a geopolitical conspiracy. How could the player follow this without constant cutscenes? The answer was the Codex. Unlike the static, optional notes of previous entries, RE4’s Codex is dynamic, auto-populating, and context-sensitive. It is the game’s internal wiki, but dressed in the stained paper and typewriter font of a spy thriller. The answer was the Codex