Sega's latest purchase is the French developer behind the Endless series, Amplitude.
The firm acquired all of the studio's shares on July 1st in an attempt to improve its PC game portfolio and development capabilities in the US and Europe. Sega has not said how much this set the company back.
Both PC games and Western development have been a focus for Sega in recent years.
In an interview with MCV earlier this year, Sega Europe SVP of commercial publishing John Clark said that its core studios are the UK's own Sports Interactive and Creative Assembly, as well as Canada's Relic Entertainment.
These firms are behind PC hits Football Manager, Total War, Dawn of War and Company of Heroes.
Amplitude was founded in 2011, and is known for the Endless series – including Endless Space, Endless Legend (pictured) and Dungeon of the Endless – which has sold 2.4m units to date. A fourth game, Endless Space 2, is currently in the works.
To have the opportunity to add a studio with the growing reputation of Amplitude's, to the Sega family, is an exciting one and reinforces Sega Europe's position as a market leader in publishing high quality PC games” said Sega Europe boss, Jurgen Post.
Culturally, Amplitude is a fantastic fit for the business as it not only produces great games, but also have a proven track record in listening to their fans and directly involving them in the ongoing development of its games through its GAMES2GETHER system.”
The company also recently acquired Persona publisher Atlus and has partnered with Playsport Games.