Just Cause 4 is an action-adventure game developed by Avalanche Studios and published by Square Enix. It is the fourth game in the Just Cause series and the sequel to 2015's Just Cause 3and was released for Microsoft Windows, PlayStation 4, and Xbox One on December 4, 2018. The game is set in a fictional South American country called Solís, which is home to extreme weather.[4] Rico Rodriguez takes on the Black Hand, the world's most powerful private army run by Gabriela Morales, a newly introduced character.[4] The Black Hand served as a mercenary group to dictators Salvador Mendoza of Just Cause and Sebastiano Di Ravello in Just Cause 3. When Rico is shown evidence that his late father was working with The Black Hand, he plunges into the South American nation of Solís, the homeland of the Black Hand in search of answers.