From SC2Pod
The Goliath was a unit often used for supporting other armored units by using its anti-air weapon.
Lore
The Goliaths, manufactured by LarsCorp Technologies, were originally built for the Kel-Morian Combine to serve as infantry support. Corporate saboteurs stole the plans and sold them to Confederate interests, and to this day the Goliath is well-known along the Rim.
Featuring all-terrain maneuverability and a computerbased heavy-weapons systems, the Goliath is equally adept at providing both ground level and anti-air support. It is armed with twin 30mm smoothbore Autocannons and Hellfire-AA Scatter Missiles. The use of Goliaths in the infamous Kel-Morian Mining Revolts showed just how effective even a small number of these versatile Combat Walkers can be when engaged in intensive urban warfare.
Weapons
Upgrades
StarCraft 2
To replace the Goliath and its role mainly as armored, anti-air support, the Viking was introduced, which offers a more mobile anti-air defense.