Defend your colony from alien invasion! Protect the Command Center at all costs.
Buildings: Command Center (core), Power Plant (+energy), Barracks (+soldier patrol), Research Lab (unlocks upgrades).
Towers: Laser→Plasma→Ion Cannon, Missile→Torpedo→Nuke, Shield→Barrier→Dome, Drone→Squadron→Fleet. Click tower type then click map to place.
Resources: Energy from solar panels (auto). Minerals from clicking passing asteroids. Gold from kills.
Fog of War: Aliens visible only near towers. Build Radar to reveal all.
Click towers to upgrade or sell. Click buildings to see status.