Characters/The Combine/Sentry Turret

The Combine Sentry Turrets are very similar to the Aperture Science analogs. There are differences such as: It is unknown if the Combine turrets will appear in Portal:AAA (but it is likely, since the player will see Combine-controlled areas).
 * The Combine Sentry Turrets are lighter, are painted in black, and have a laser fading out after 1 meter (3 feet). They also feature a City 17 logo on them.
 * The Combine Sentry Turrets have a shorter shooting range.
 * Alyx Vance can reprogram the Combine Sentry Turrets to attack the Combine themselves. It is unknown if she can do the same with the Aperture Science analogs (but it is unlikely, since she's never seen one through the entire Half-Life series).