Famous PC game mods that have more recently made headlines include Skyrim (with over 40,000 mods), Fallout 4, Doom, Half-Life, and Counter-Strike. It has been a hit in PC gaming as early as the 1980s when the game Castle Wolfenstein was modified to become Castle Smurfenstein with the introduction of a mod that replaced enemies with Smurfs. Modding is the act of modifying hardware, software, or virtually anything else to perform a function not originally conceived or intended by the designer. Castle Smurthenstein (Image Credit: Apple II Bits) Modding