The Invasion DLC adds a battle for the planet with a hostile alien race to the game.
The player can call for a giant spaceship to appear in orbit, which will send well-armed troops to the surface over and over again.
DLC details:- Underground alien bases with new mobs and resources.
- New weaponry and construction technologies based on alien structures and mechanisms.
- A conflict between ecosystems of two worlds hostile to each other and contamination of the earth and its resources.