Atlus Co., Ltd. (株式会社アトラス, Kabushikigaisha Atorasu) is a Japanese video game developer, publisher, arcade manufacturer and distribution company based in Tokyo. A subsidiary of Sega, the company is known for the Megami Tensei, Persona, Etrian Odyssey, and Trauma Center series. Its corporate mascot is Jack Frost, a snowman-like character from their Shin Megami Tensei series. The company is also known for their Print Club arcade machines, which are selfie photo sticker booths in East Asia.

Atlus was established in April 1986 and spent its early years as a video game developer for other companies. It became a video game publisher of its own in 1989. The company was acquired by Index Corporation in October 2010. After the merger, the Atlus name continued as a brand used by Index Corporation for video game publishing until 2013, when Index filed for bankruptcy. The company’s assets were bought by Sega via the subsidiary Sega Dream Corporation, which took the Index Corporation name. The non-video game assets were spun off under the Index name a few months later and sold in 2016, leaving the video game division under the Atlus name as a subsidiary of Sega.

A North American branch of the company, originally Atlus USA and now Atlus West, was founded in 1991 in order to focus on publishing and localizing games for North America. A European branch, handled via the London-based Sega Europe, was founded in 2017.

Reference: Wikipedia