I Build a Mech Army

The world is overrun with Zombies. Leo Sullivan gains an ability to transform vehicles into robots. Collecting "Evolution Cores" from Zombies, he expands his mechanical army. From Crimson County, Leo Sullivan defeats The Revival Society and Fire Cloud Base, and subjugates Zombie lord Serena Sullivan. He advances into Rose City, defeats the City of Steel, Black Gold Consortium, and Crimson Flame Base, unifying Rose City!