All people's doomsday game, I start with unlimited increase

Everyone traveled to the apocalyptic game world. He built the strongest fortress, automatic sentry guns, automatic warning guns, automatic rockets, automatic missile silos... Chu Feng stood on the tall city wall, looking at the intelligence sent back by the drone reconnaissance, looking at the zombie tide in the distance, and silently pressed the communicator. "The drone locks the target area and covers it with artillery fire until the zombies don't stand up." After receiving the order, the automatic warning guns in the fortress turned towards the target area and locked the target area. "Boom." One round is not enough, two rounds, two rounds are not enough, three rounds, the zombie tide was completely cut off under his unlimited firepower attack, and the whole army was wiped out...