The Underverse

When America decides to play god and create zombies and other monsters they don't expect them to actually escape and ruin the world, in desperation to destroy them the take multiple nukes and detonate them across the world but guess what, radiation doesn't affect the dead experiments. As the world falls apart the remaining humans split into tribes across the Continents. The story follows Arin and Viktor as they go after their friend Parker who is separated from them when the zombies somehow find their village in the trees and attack them. Most of the village is destroyed and they have to go to the nearest safe look out point go contact another village to warn them and find the tribe of Military to help them and get shelter. They meet multiple other tribes on the way and pick up more people who hate being stuck in one place. The devastation comes when they find a tribe who's lost their humanity, the tribe of lost soldiers. Arin and Viktor almost die and lose hope but as they find an island they find Parker and only a few of the people from the village there they begin to question how they survived without the food and help of the military.