A development of theGespenst, the Alteisen is a heavy, close combat mecha, so heavy in fact it needs its ownanti-gravitysystem in order to remain upright. It possesses the revolver stakepile bunker, a multi-missile system and area denial shotgun in its shoulders, a heat horn on its head, and a three-barreled autocannon on its left arm. It is piloted byKyousuke Nanbu. The mech is later upgraded toAlteisen Riese.