Avalanche Studios Group is a Swedish video game developer and publisher based in Stockholm. It is a parent company that includes Avalanche Studios, Expansive Worlds, and Systemic Reaction. Founded by Linus Blomberg and Christofer Sundberg in March 2003, Avalanche Studios focuses on developing open world projects and bases them on their proprietary Apex game engine (formerly known as Avalanche Engine). The company is best known for developing the Just Cause game series. Formed after the collapse of Rock Solid Games, the studio gained early success with the first Just Cause title.

The team then began Just Cause 2's development, but the company suffered from financial problems due to the cancellations of two contracted projects. Despite missing the release window twice, Just Cause 2 was both a critical and financial success for Avalanche Studios. The company then opened a studio in New York City to work on Just Cause 3, while the Stockholm team began working on Mad Max in collaboration with Warner Bros. Interactive Entertainment. The company announced two titles in 2017, Rage 2 with id Software and a self-published title named Generation Zero. Nordisk Film acquired the company in 2018, having invested into it the year prior. A casual gaming subsidiary, Expansive Worlds, was established in March 2010 to work on theHunter series. The company aims to begin self-publishing new original intellectual properties in the future. In addition to the offices in Stockholm and New York City, the company opened a second Swedish office in Malmö in May 2018 and an office in Liverpool in June 2020.