Gens一套针对电视游戏机－世嘉Mega Drive（MD）而发展的家用机模拟器软件，其功能是让用户配合游戏数据档（Rom）在个人电脑上亦能运行到Mega Drive的游戏，目前已有很高的开发完成度，支持大部份Mega Drive游戏。2006年后Gens虽不断更新，不过仅支持32位的Linux和BSD。

Gens32则是Gens的延伸版本，是以Gens作者开放的Gens源代码为基础的仿真器。Gens32支持了32比特色彩模式、7z格式及LDU系统。Gens32作者为来自中国大陆的Dark Dancer，使得Gens32成为目前唯一致力提升中文游戏仿真度的仿真器。

In ancient Rome, a gens (/ˈɡɛns/ or /ˈdʒɛnz/), plural gentes, was a family, consisting of all those individuals who shared the same nomen and claimed descent from a common ancestor. A branch of a gens was called a stirps (plural stirpes). The gens was an important social structure at Rome and throughout Italy during the period of the Roman Republic. Much of an individual's social standing depended on the gens to which he belonged. Certain gentes were considered patrician, others plebeian, while some had both patrician and plebeian branches. The importance of membership in a gens declined considerably in imperial times.