In Alien Defense, you take control of an extraterrestrial being with octopus and spider features; in this game, you must protect your base against hordes of deadly undead.
Your only objective will be to defend your base and, with the money you earn from victories, to gradually upgrade it. Gradually enhancing your abilities allows you to confront foes who are both more strong and more deadly. Assume the role of your race's final chance for survival by making a plethora of smart options!