Avalanche Studios is a video game developer based in Stockholm, Sweden. It was founded in March 2003 by Christofer Sundberg and Linus Blomberg. Avalanche Studios focuses on developing open world projects and bases them on the Avalanche Engine. Formed after the collapse of Rock Solid Games, the studio has expanded from six members to 250 staff members. As well as their main studio in Stockholm, they have two further studios: a studio in New York City (since November 2011), that worked on Just Cause 3; and a subsidiary studio in Stockholm named Expansive Worlds, that worked on The Hunter.