What is the protagonist's title given by the demons in DOOM (2016)?

In the 2016 video game "Doom," the protagonist is given the title "Doom Slayer" by the demons. The game's narrative revolves around the player-controlled character, who is a powerful, heavily armored individual awakened from a sarcophagus on Mars to combat the demonic invasion unleashed by the Union Aerospace Corporation (UAC). The demons, recognizing the protagonist's formidable abilities and relentless pursuit of them, refer to him as the "Doom Slayer" in acknowledgment of his role as a relentless force against the demonic hordes. The title reflects the character's reputation and role in combating the demonic threat throughout the game.