In the Doomsday Wasteland, I Became a Hunter in the Center of the Earth

The moon fell and destroyed the world, and 100 million humans were selected to enter the inner earth world to play a battle royale game called 'IEW'. Nuclear winter, unknown plague, mutated insect plague, strange and deadly phenomena... Only by completing G's trial can you survive! The protagonist stated that he changed his job to a special profession "Volcano Hunter". In order to survive, He climbed the sky list, upgraded the doomsday RV, passed through the wind hole and returned to the surface city to find the treasure chest... A ruthless lone wolf? Or a savior of last resort? The legend is unfolding in this strange yet familiar world! ! !