Galbadian Army Cruise Missile BAG0003A

Galbadian Army Cruise Missile BAG0003A is a weapon of the Galbadian army in Final Fantasy VIII. The intercontinental cruise missiles are launched from the Missile Base, a remote military installation on a desert near to Deling City.

The missiles home in on pre-programmed targets. Perhaps due to the worldwide radio interference, it doesn't appear to be be possible to interact with, change course or intercept the missiles once they have been launched. Precisely how the missiles locate their targets is unknown as radiolocation or GPS should not be possible due to the radio interference, but during close-ups the cruise missiles are shown to scan their surroundings with a red "eye".

Story
After Sorceress Edea usurps power in Galbadia, she orders Trabia and Balamb Gardens destroyed by the nation's long range missiles. Squall Leonhart's SeeD party learns of this while imprisoned in D-District Prison, and after escaping, they witness missiles being launched in the horizon toward Trabia Garden. Selphie Tilmitt makes it her mission to stop the next launch while Squall leads his party to warn Balamb Garden.

Selphie's team infiltrates Missile Base in disguise and try their best to sabotage the launch. The launch goes on ahead even if Selphie's team turns off power to the complex, maximizes up the missiles' programmed error ratio, and defeats the base leader, setting the base to self-destruct afterward. The defeated soldiers start the launch even as the base is being evacuated, and a salvo of missiles are sent toward Balamb Garden.

Squall's team reaches the Garden in time to warn them of the threat, and Headmaster Cid tells them of the building's origins as a Centra shelter. Squall's party descends to the bottom floors of the Garden to activate its mobile functions, and as the missiles arrive the Garden moves away from the spot the missiles were programmed to target. The site s destroyed, but Balamb Garden rides the blastwave to safety.

Trivia

 * Though this is never mentioned in the game, if the missiles do home in on based on sight or gathered optical information, Esthar City being made invisible through a cloaking device could be as a deterrent to the Galbadian cruise missiles.
 * The player can view the weapon specs of the missiles from the Missile Base control panel used to set the missiles' error ratio. A different model of cruise missiles is also shown, called CGR4083B, but the player can't change the weapon used. The weapons' specifications are too small/blurry to make out in detail.