Thor/Development

In early builds, the thor could be constructed by SCVs in the field, though is now built from the factory. The thor "structure" used to cost 300 minerals/ 300 gas/ 6 supply/ 100 seconds, hotkey T.

The thor had a slow turning speed in the BlizzCon 2007 build, enabling units such as the Cobra to destroy it easily with micromanagement. It now turns fairly quickly, and the turning speed is no longer a balancing factor.

The thor was scaled down in size as it was vulnerable to micro-ing from smaller units that could be built in only a fraction of the time and resources required to build a thor. In StarCraft II beta patch 12, the thor was shrunk from a 1.375 base to a 0.8125 base size.

By March 2008 the thor was shrunk from its original size and can move faster in order to suit its anti-air role better. However, its anti-ground attack was weakened.

Previously the thor could not be transported.

The powerful and bulky thor of early development was resurrected as the Odin, a special campaign unit found in StarCraft II: Wings of Liberty.

The thor lost the Mechanical Rebirth ability for multiplayer by May 2009. Blizzard's internal playtesting showed the ability to be impractical. It was retained as a campaign ability in Wings of Liberty.

250mm Cannons (Previous Version)
Artillery Strike was a powerful long-ranged area-of-effect attack. To use the Artillery Strike, the thor had to expend energy, then it "stabilized" itself as the cannons on its back were lowered. The four 250mm bombardment cannons alternated raining damage upon the area. This ability needed to be researched. The ability was later removed as it conflicted the with the 's splash damage attacks.