this was simply asking for trouble

At that moment, Alex suddenly received an alert.

"Dear Survivor, disturbance detected outside the underground bunker!"

"Warning! Warning!"

"The energy cannot be stopped from breaching the defense!"

Strange visions arose as the system frantically sent alerts to Alex.

A series of messages made Alex frown.

The underground bunker under attack?

Meteor showers couldn't reach underground!

If they could, what was the point of the system letting them build an underground bunker?

It would be better to just dig graves.

Although Alex didn't have much affection for the post-apocalyptic world system, he wouldn't deny its accuracy.

If it said it could withstand meteor showers, then it must be able to!

So, the attack they were facing now must be something else...

Although the entrance to the underground bunker was tightly closed, several survivors entered at this moment.

They emitted a yellowish glow.