Arc System Works Co., Ltd. (アークシステムワークス株式会社, Āku Shisutemu Wākusu kabushiki gaisha), commonly referred to as ArcSys, is a Japanese video game developer and publisher located in Yokohama.

Founded by Minoru Kidooka in 1988, the company is known for arcade 2D fighting game franchises, including Guilty Gear and BlazBlue, as well as other license-based fighting games for Dragon Ball FighterZ, Persona 4 Arena (Ultimax), Granblue Fantasy Versus (Rising), and others.

It consisted at the time of around eight developers; most of whom had previously worked at Sega including founder Minoru Kidooka.

[6] On June 11, 2015, the company acquired all intellectual properties of Technōs Japan, such as Double Dragon and Kunio-kun, from Million Co., Ltd.[9] Even prior to its acquisition of Million's library, the company had been the publisher of Technōs' video games for Virtual Console in Japan.

[16] On February 6, 2017, the company acquired the rights to the Jake Hunter, Theresia, Nazo no Jikenbo, and Koneko no Ie series from publisher WorkJam.