My System Slays All Zombies

Zombies besiege the city. Delivery worker Finn Crawford awakens a search system! He upgrades weapons, enhances vehicles, and uses an RV to crush zombie hordes. Hypocritical survivor Owen Lowe seizes power, harms companions, gets infected, and becomes undead. Finn gathers supplies, rebuilds a shelter, and fights. The zombie army is wiped out! With the system, he is the king of the apocalypse, and rescue finally arrives!