Watch Fortress (2021) HD Full Movie Free on SolarMovie. Watch Fortress (2021) online free. A group of criminals led by Robert's former nemesis - Balzary who hellbent on revenge, forces a reti...A group of criminals led by Robert's former nemesis - Balzary who hellbent on revenge, forces a retired CIA Agent and his estranged son into a high-tech bunker. Will the thick walls and defenses be powerful enough against Balzary's forces.