Iron Fortress

Iron Fortress is a character from Metal Slug franchise, she makes her debut on Metal Slug Attack as a playable unit.

Profile
A huge tank equipped with an independent AI, developed by the Professor to protect White Baby from physical attacks. It's maximized for physical use, with no virus abilities. Unlike White Baby, it's friendly to both humans and the organization. Repeated teasing from White Baby has given it a weak personality. But it's powerful cannon fire is anything but weak, as enemy armies can attest.

Between Metal Slug 1X0 and Metal Slug 14
Some time after the events of Metal Slug 1X0, Iron Fortress has born with a pure heart, but after noticing that her sister White Baby died, that pure heart becomed one depressed yet happy to hide who she truly is, she found the Valerian Bears, toys from White Baby to play with them as a purpose to believe on herself and avenge her sister's death.

Metal Slug 14
After the defeat of Donald Morden, Iron Fortress managed to hack all the computer systems from Rebel Army, betraying her own creator only with the purpose to face the ones who killed her sister, she send the Valerian Bears to attack them but they managed to surpass them by destroying them and dodging their suicide attack.

Later she reveals herself with a happy smile to then turn her face to a satisfactory one, letting the fight begin.

At the end of the fight, the Iron Fortress explodes and the A.I., suffering, starts to slowly disappear while she says "sorry sister...i...have...failed...you...dying...dying..." as her last words.

Metal Slug Appearances
Metal Slug 14

Iron Fortress appears as the final boss.