King of the Undercity

A miner, Adrian, buys a diamond ring for his fiancée but is humiliated by her and Jason, heir of the Upper City, then thrown into a waste pit. In an abandoned bio-zone, he inherits the First King's power and becomes a bio-enhanced armored warrior. Rising through underground pit fights, he marches back to the Upper City, freezes the Golden Crown's assets, destroys the Elder Core, defeats Jason, and founds Free City — only to face the looming threat of the Verdant Empire.