< Commander: A dark-side, lunar base is threatened and needs the establishment of a defense grid. A rapid response and strong effective grid is your assignment. Take no prisoners. >

< Commander: Our scans have detected an Alien presence on Europa. The Europa Central Command has the only Core housing on the moon, and requires your defensive skills. This moon is about to receive an influx of development and a strong defense grid is integral to the plans. >

< Commander: An industrial complex is the new target of the Alien raiders. The factory uses a low cost, mechanical, adaptive defense system that has seen better days. The system is old, awkward and clunky but it is all you have to work with. Do your best to protect the cores. >

< Commander: Our sensors have marked the PKD Research Lab as the enemies next target. Designed for other purposes, the basic structure is more than adequate to construct a defensive grid. >
< The facility is named after a prolific and prescient, mid 20th century scifi author Philip K Di...

Difficulty from easy to hard

< Commander: A small, coastal water purification plant is under attack. It looks like an easy target but appearances can be deceptive. This is a newly constructed research facility and will provide you with what you need. Keep the Cores safe! Take no prisoners! >

< Commander: A nuclear fusion experiment, on Mars, went bad. The result of decades of containment and clean up, is encased in a giant concrete and lead puck. It nearly bankrupt the planet, lifting the enormous mass into orbit and has attracted the Aliens attention. While the Martian government...

< Commander: Ballista Station is under siege! A prompt and brutally efficient response to this threat is required. Protect the cores and establish a viable defense grid for the station. >
< For a decade or two the architectural trend was to fashion and name military outposts after an...

< Commander: A de-salination/brine mine is threatened. Brine Mine 9 extracts potable water, Lithium, Bromine and other valuable elements from the Don Juan Pond which lies nestled in the McMurdo Dry Valleys in Antarctica. As the ice melted, the basin filled up with water that has dissolved more...

< Commander: Murkwood Station is threatened. It was not designed with military considerations, has too many ways to access the cores and an awkward floor plan to set up an efficient defence. Compounded by the fact that the Aliens thrive in the heat and dense, moist atmosphere; they will prove ...