Catty Catty Catty

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..."

EndlessFantasy Translation 

My Post-Apocalyptic Shelter Levels Up Infinitely!

LambSheepMutton

"Due to the shelter being submerged even further, although the wind from the upper floor can be channeled down through the pipeline, stale air will still precipitate. Without a ventilation system, it might cause serious problems in the Underground Shelter!"

When creating an underground shelter for the first time, the game panel indicated that its development potential was poor.

One of the main reasons for that was that it would be extremely difficult to construct an underground air circulation system!

If ordinary people chose to be underground, they might not have needed to open the door for ventilation at first. However, it would be difficult to even build a window or ventilation system without mechanical assistance after a few months of development.

Therefore, during the first disaster, only Su Mo had chosen to go underground among the top ten shelters.

Blessing’s Limit, The Mysterious Feather