Tunnels Everywhere

As the surface expedition delved deeper into the round islands, two more discoveries were made: First, that every island seem to have a duplicate internal layout of tunnels beneath them. They vary slightly in size, but not in how they are laid out. The second discovery was even more astonishing: the islands aren't parts of the planet crust - they actually float! Their lower levels are filled with pockets of gas, which combined with the fairly brittle and porous island rock makes then buoyant.

The command below will trigger the "Tunnels Everywhere" event in Stellaris:

When this event fires, you can choose between the following option:

• Keep digging!