Fait d'hiver (1999)

This is a psychological drama about Louis Riquier, a veteran of the Algerian war and a divorced father whose wife has custody of their children and who barricades himself with the kids in his country house. The police and the press surround the house, but he does not want to surrender. Instead, he gets more and more violent. Manipulated by their father, the kids go along with the scenario, taking it as a game.

Unfortunately the movie Fait d'hiver is not yet available on HBO Max.