Fallout 4, released by Bethesda Studios on November 10, 2015, is a highly successful single-player open-world game set in a post-apocalyptic version of Boston after a nuclear war. Players control the sole survivor of Vault 111, who embarks on a mission to rescue their son while navigating a world filled with factions, NPCs, and various gameplay mechanics such as a settlement system and an upgraded AI. The game is noted for its immersive graphics and mechanics that enhance player freedom, but also faces criticisms regarding bugs and AI pathfinding issues.