Creating an Apocalypse with the System

Just after graduating from college, Xuanyuan Tian was hit by a speeding car on his way to look for work. When he woke up, he had transmigrated to a parallel world, where his golden finger gave him a System.

"Ding! Congratulations, Host. You have obtained the Shop System. Kill zombies to earn points, which can be exchanged for any items you need."

Ten years into the apocalypse, after Xuanyuan Tian killed the very last zombie, he unexpectedly...