The Scorpion Main Battle Tank from Halo is one of the most recognizable armored fighting vehicles in all of video game history. The tried and true vehicle platform is incredibly efficient with very few updates throughout its long service history. This is the M808B variant of the model which includes a covered top for the driver and a coaxial M231 machine gun. 

The AAT (Armored Assualt Tank) Battle Tank served as the primary infantry defense vehicle for the Trade Federation droid army. It was first seen in Star Wars Episode I - The Phantom Menace where it showed its combat effectiveness when fighting the Gungans. It was such a reliable combat service vehicle that they were used by the Separatists in the Clone Wars.