虚幻系列（英语：Unreal，中国大陆译作「虚幻」）是Epic Games开发的第一人称射击游戏系列。系列还因支持游戏并授权其他开发商使用的虚幻引擎而知名。作为Epci聚焦于引擎技术的结果，地图设计等许多创造性工作量历来都外包给其他工作室，即Digital Extremes。Legend Entertainment制作了第一款游戏的扩展包和续作《虚幻II：觉醒》。但最新作品全部设计工作由Epic内部完成。

系列发行权数次易手。GT Interactive是初代发行商，一系列的收购和公司重组将权利转移到Infogrames及之后继承的雅达利。然而在《虚幻竞技场2004》制作中，Epic和雅达利的财政争议，让Epic决定将未来作品的发行权交给其他方，并最终与Midway Games签订协议。

Unreal is a series of first-person shooter video games developed by Epic Games. The series is known for its exhibition of the Unreal Engine that powers the games and is available for other developers to license. As a result of Epic's focus on the engine technology, much of the creative workload such as map design has traditionally been outsourced to other studios, namely Digital Extremes. Legend Entertainment was brought in for the first game's expansion pack and its sequel, Unreal II: The Awakening. For the latest installment, however, Epic completed all design work in-house.