Interstellar defense

Interstellar defense is looking for planets that are suitable for colonizing. Get valuable resources and build a powerful fleet. This game will take you to a distant future. The universe has spread and met aggressive aliens. Protect your colony from the aliens. Put ships on enemy's way. There are ships that have unique characteristics. You should upgrade your weapons on the ships. There are over 15 planetary systems and over 200 levels in the game.