Survive and colonize on an unknown planet near a red star. Find and gather resource, build shelter and engineering factory, avoid alien invasion, and finally build/maintain working ecosystem on the planet. Whole game goes within a single persistent simulator in the server that will be reset periodically with some game rule/setting changes. In short: massively multiplayer planetary colonization game.
Many towers are built by unknown civilization that landed on this planet earlier.
The towers seem to be stealing metal resources contained in the black dust,
and they are generating many harmful robots from it.
The robots could be simply cleaned with a beam gun and got useful resources from them,
but because they are too harmful, we have to clear up them before starting colonization.
It is obvious that we need stronger weapons to destroy the towers directly, but I found we can beat it by
digging the base of the towers.