Expansion packs are additional content packages for video games that enhance the original game experience. They often include new features, such as extra levels, characters, or storylines, allowing players to explore more of the game world. Expansion packs can be purchased separately and are designed to extend the life of a game by providing fresh content. Many popular games, like The Sims or World of Warcraft, have released multiple expansion packs over the years. These packs can vary in size and complexity, but they generally aim to keep players engaged and excited about the game by introducing new challenges and experiences.