Game modifications, often referred to as mods, are alterations made to video games that change or enhance gameplay, graphics, or features. These modifications can be created by players or developers and can range from simple tweaks, like adjusting game difficulty, to extensive changes that introduce new content, characters, or storylines. Mods can be found for various types of games, including role-playing games and first-person shooters. They are typically shared within gaming communities, allowing players to download and install them easily. While some mods are free, others may be sold or offered as part of a crowdfunding campaign.