You have to set out into the world to find your missing child by exploring the world, completing quests, and levelling up to acquire new skills.
In Fallout 4, you play the Sole Survivor, emerging from cryogenic stasis in an underground nuclear shelter. It takes place 210 years after “The Great War”, which has caused catastrophic nuclear devastation across the USA. The game is set in an open world environment based on the city of Boston and its surrounding region. Published by Bethesda, it was released with VR support at the end of 2017.