Non-playable characters, or NPCs, are characters in video games that players cannot control directly. They are designed to enhance the game world by providing quests, information, or interaction. NPCs can be friendly allies, neutral bystanders, or hostile enemies, depending on the game's narrative. These characters help create a more immersive experience by populating the game environment. They often have scripted behaviors and dialogue, allowing players to engage with the story and the game world. NPCs are essential for driving the plot forward and enriching gameplay in various genres, including role-playing games and adventure games.