Cave

'''This article is made from the leaks tnt posted in the community Discord server. This information is made off of assumed information and may not be correct.'''

The cave is a teased section in Mineral War Tycoon. To get here you will an unknown amount rebirths and it is assumed you will access it via the area beside the nuclear arsenal. (The door with the red nuclear symbol reading "Under Construction" above it.

Not much is known about the area itself.

Update: This turned out to be the entrance to the new Space area.