The times when the Earthmen fought with each other seem paradisiacal in comparison with what the planet is waiting for in the future. The threat came from outer space in the form of aggressive aliens, who are going to destroy humanity and liberate territory for their race. People forgot about the quarrels and united against the aliens. Their flagship hovered in orbit and sent combat scouts to the planet. You must quickly install towers with laser cannons to repel enemy attacks. Add new towers, improve them, upgrade, place shields. If the towers are not enough, move the panel horizontally to fully capture the wave of attackers in Ufo Attack Tower Defense.