Mr. X is primarily known as a character and antagonist from the 1998 survival horror video game Resident Evil 2 and its 2019 remake, part of the Resident Evil franchise created by Capcom. He is also called the T-00 Tyrant, an intelligent bio-organic weapon developed by the Umbrella Corporation. Mr. X is a towering, relentless pursuer of the game's protagonists, Leon S. Kennedy and Claire Redfield, throughout much of the game. Unlike other Tyrants, he wears a trench coat and, in the remake, a fedora hat, which contributes to his distinctive and somewhat gentlemanly appearance. His design and behavior—stalking the player with ominous footsteps and unyielding persistence—have made him a memorable and fearsome figure in gaming, gaining significant popularity and even becoming an internet meme
. In the game's story, Mr. X was deployed by Umbrella Corporation during the T-virus outbreak in Raccoon City to eliminate survivors and retrieve a sample of the G-virus. He is immune to normal weapons and can regenerate, making him a formidable foe. His presence in the 2019 remake was enhanced with advanced AI that allows him to stalk players dynamically, increasing the game's tension and horror atmosphere
. Beyond Resident Evil , the name "Mr. X" is a common pseudonym used to refer to an unknown or secret identity in various contexts, including comics, films, music, and other video games. However, the most prominent and detailed use of "Mr. X" in recent popular culture is the Resident Evil character
