Mod

Mod is short for game modification. Mods are a form of custom content in that they must be downloaded and their file(s) must be placed properly. However, they are not in-game objects such as clothing or new decorative objects, though some mods use an in-game item to enable or disable their features. This distinguishes them from "hacked objects". Mods mainly alter gameplay values or add/change already existing features.

Examples of small mods would be phone plugins for The Sims, mods such as the Less Addictive Espresso Bar mod that affect how strongly an object advertises, or making homework complete faster. Example of big mods would be Awesomemod and Macrotastics.