All purchases add more.
The mining facilities on Xolara are swarmed by alien creatures. Build effective defenses, gather precious minerals and repel the invasion.
Build defense turrets to protect the path leading to your base.
Collect minerals to power-up your defense turrets.
[P] to pause game
[R] to rush the next wave
 to call a rocket strike
 to call a tesla strike
[D] to deploy an additional mineral drone