"The AAT isn't a subtle instrument. Its powerful weapons wreak havoc on anyone foolish enough to stand in its way."
— Website descriptionThe AAT is a relatively slow moving vehicle, but has high health and high damage to compensate. However, the AAT should not leave its rear exposed, as the rear is more susceptible to damage. The Siege Mode ability locks the AAT down in place, which allows the use of its heavy laser cannon to deal high damage to infantry and vehicles even at longer ranges. When engaging enemies at a closer range, the High Explosive Shells can be used to devastate targets caught in its blast radius, although the range of the shells are limited. The AAT is also effective at taking out air support with its Linked Fire, especially slow moving LAAT Gunships.
In the PC version only, there's a bug that makes the Siege Cannon ability not work properly. You activate it and seemingly nothing happens. You can't fire with the main gun at all. The reason for this glitch is tied to the specific Key on your Keyboard that was chosen to activate the ability. Whenever the key '2' is mapped to the Siege Cannon ability, it won't ever work. Instead, map it to the default button and the bug is gone. You may try other keys too, but be sure to test them as there may be more keys that cause this issue.
In the movies, the AAT is piloted by four Battle Droids. A Commander Battle Droid, a Pilot Battle Droid and two Battle Droids gunners and is able to carry six additional Battle Droids onto the battlefield, while in the game it could only be piloted by a single Battle Droid.
The AAT has different paint jobs depending on the game mode that it is in. In Galactic Assault, they will sport the Trade Federation paint job as seen in The Phantom Menace. While in Capital Supremacy, it will sport the color scheme and logo of the Separatists as seen in The Clone Wars.