As disaster was about to strike, a group of survivors transmigrated into a desolated world and were challenged to a game of survival. From terrifying acid rains, to endless natural disasters, the heavens burn while the earth scorches, radiation is rampant, and nobody is spared from the dangers of this hellscape. The only way one survives is by building a shelter and slowly upgrading it in hopes of surviving another day. 
Luckily, Su Mo awoke a Doomsday Survival System that allowed him to infinitely level up and upgrade his shelter! The main shelter wooden door can be upgraded into a metal door, which in turn upgrades into a composite gate; the wooden spears can be upgraded into bronze spears, which eventually upgrade all the way into electromagnetic spears... While everyone struggled to survive, Su Mo was fully loaded, and well equipped to dominate the post-apocalyptic world. 
"While some of us are lighting oil lamps, he's been using refrigerators!" 
"The walls in his shelter alone are tens of meters thick, it's the safest place on this planet."
"Before I die, I wish to spend one day in his shelter..."

The daily reports provided by the system were also divided into different Levels.


Before this, Su Mo only saw ordinary white ones and the golden ones generated after multiple days of accumulation.


This was his first time seeing a green one.


As the daily report interface fully unfolded, Su Mo's expression turned to one of realization after seeing everything displayed.


[doomsday calendar April 7th - Thursday]


[Territory status]: Awaiting reconstruction. The territory already possessed basic survival conditions for plants and certain residential buildings, sufficient to meet the survival needs of a small number of Territory residents.


[Territory area]: 150 square kilometers (Neither small nor large. You had enough survival space, but absolutely no strategic depth.)


Chapter 517 - Chapter 517: Full Upgrade, Trading a Shotgun for a Cannon!