|Character in Just Cause 4|
|First appearance||Operation Whiteout|
|Job||Ruler of Solís (actual title unknown)|
|Last known status||Deceased|
Oscar Espinosa is the main antagonist of Just Cause 4.
As a sign of personality, he sounds a little arrogant and bored with the information provided by Gabriela during the opening sequence of the game.
As revealed by the Solís Hoy radio, his father was Leon Espinosa. Oscar has also written an autobiography called "I am the son of my father". Leon Espinosa died in a plane crash 20 years ago. Oscar is also a descendant of Diego Espinosa.
According to Diago from the radio show, Oscar is a fan of Diago, although he is unable to prove it upon being questioned about it by Santiago.
When his father died, Oscar took over all the companies and turned the Black Hand from "a bunch of local badasses" into what they are now. In fact, because he funded the Black Hand, he is their employer. Because Solís has no other police, or military, this puts him well above the law.
His father's plane was taken down by a storm, so officially, this is what motivated him to start Project Illapa, to end all storms. It's revealed during the course of the game that this was a lie. The origin story of the project and the circumstances of León Espinosa's death were actually more complicated.
In the ending cutscene of Operation Illapa, the storm core that he planned to unleash on the mountain fortress of Illapa was instead redirected to his plane, destroying the plane and killing him with it.
There is apparently some rumor that Oscar survived, but the chances of this are impossible, as the Solís Hoy radio reported Oscar's death, and they would have nothing to gain from lying about his death.
- He used to own a customized Verdeleon Eco (or possibly multiple of them, because the car is also available to Rico via DLC. As stated by one of the games loading screens: "Escarlata is famous in the Solino Underground for boosting Oscar Espinosa's personal Verdeleon Eco and driving it off the cliff at Dos Padres."
- He also has an EM-909 Private Jet, which he uses during the last storyline mission Operation Illapa.