The End of the World: Bind the Delta Material System at the Beginning

[Urban apocalypse + non-rebirth + system + delta + decisive killing + single female protagonist + not brainless] On the first day of the apocalypse, Lin Shuo awakened - the Delta material selection system. While others are still thinking about how to live, he is thinking: How many supplies can he choose this time? Grenades can clear the hall, bows and arrows can make headshots, and primary physical strength enhancers can increase your attributes to the point where you can kill zombies with one punch. From two people to six people; from the third floor to the fifth floor. The more zombies you kill, the harsher the system will punish you. The zombie who climbed out of the window on the fifth floor and disappeared, the van speeding outside the wall—— This world is bigger and wilder than he thought. Then keep killing, keep choosing, and keep going up. The end of the world? Just in time, let's heat up the system.