The latest update for Monster Hunter: World guest stars CD Projekt RED’s Geralt of Rivia in a special quest. Here’s how to start the quest. The quest starts at the main HUB world, speak to the Third Fleet Felyne located at the main entrance, it’ll have a large blue question mark. Afterward, head to the Research Base and downstairs to trigger Geralt’s arrival. Monster Hunter: World is now available for PC, Xbox One, and PS4.