"Iron Balls," released by Unidesa/Cirsa in 1987, is a solid-state, four-player pinball machine featuring a robust array of playfield elements. The game is equipped with two flippers, three pop bumpers, a six-bank drop target assembly, eleven standup targets, two kick-out holes, and five captive balls arranged in a looping mechanism that holds four of the balls. Additionally, it includes three star rollovers, enhancing the dynamic gameplay experience.