Saudi Arabia's government is an autocratic monarchy.
Explanation:
Autocracy is a form of government in which the nation is controlled and ruled by only one person. History says that Adolf Hitler is an autocrat.
Monarchy is a form of government in which one person takes the power of ruling by heredity and rules the nation. Queen Elizabeth II is a monarch.
Some of the countries that follow autocratic monarchy are Saudi Arabia, Oman, Qatar, Brunei and Eswatini.
If an individual proves himself as a dictator and overthrows the existing government, he/she can get a chance to be the autocratic leader.