Game mods and user-generated content play a crucial role in extending a game's lifespan by providing additional content, features, and experiences that enhance the overall gameplay. This can lead to increased replay value, as players have more reasons to continue engaging with the game. Additionally, mods and user-generated content can foster a strong community around the game, driving ongoing interest and participation long after the initial release. Ultimately, they can help keep a game relevant and popular for years to come.