Doomsday Counter War Upgrade

Traveling to a parallel world and being told by the system that the end is coming, I have no choice but to seize the time and prepare based on my past life experience. "Ding! The doomsday has begun. Congratulations to the host for getting a survival gift package, a set of fashionable protective clothing, a P92 pistol, a storm hammer, and 4 attribute points." Under the threat of survival and the temptation of the system, Du Jiang went further and further on the road of killing monsters and upgrading.