资料片（expansion pack, expansion set, supplement，英文原词实际含义为扩展包、扩充版等，资料片这一译名易让初闻者误认为是原版游戏相关的参数详解资料或攻略资料之类。），指游戏软件公司在一个自己先前开发的作品基础上，利用该作的引擎和大部分图像数据，增加一些新内容而开发出来的游戏扩展软件。单机游戏、网络游戏等都在此限，增加的部分主要有：角色、NPC、任务、剧情、物品、BOSS等。

An expansion pack, expansion set, supplement, or simply expansion is an addition to an existing role-playing game, tabletop game or video game. These add-ons usually add new game areas, weapons, objects, and/or an extended storyline to complete an already released game. While board game expansions are typically designed by the original creator, video game developers sometimes contract out development of the expansion pack to a third-party company, (see Hellfire for Diablo), it may choose to develop the expansion itself or it may do both (Ensemble Studios developed the real-time strategy game Age of Empires III and the first expansion called the WarChiefs itself, but contracted Big Huge Games for the second expansion pack, the Asian Dynasties). Board games and tabletop RPGs may have been marketing expansions since the 1970s, and video games have been releasing expansion packs since the 1980s, early examples being the Dragon Slayer games Xanadu Scenario II and Sorcerian.