Tower Breaker (A LitRPG Apocalypse)

Break through. Level up. Never stop fighting. Nate Rowe had nothing left. A career-ending injury destroyed his future as an MMA fighter. His parents disowned him. When six mysterious towers appeared across the city and monsters began pouring into the streets, he didn't run. He walked straight in. The System rewards those who survive. For every monster killed, Nate grows stronger. Faster. Harder to kill. What started as a death wish becomes something else entirely—a second chance to fight, to matter, to become something more than the broken man he used to be.