EARTH BASE PROTECTION

Many years have passed since our once blue planet acquired such a deplorable appearance. Endless wars and alien invasions left no chance for the former nature to survive. Well, you need to protect what's left. Aliens are trying to destroy your Earth base, so immediately join the defense. Shoot at all enemy combat units and do not allow them to fly up to the base within shooting distance. Your base, however, has a fair supply of weapons, which you can connect gradually, level by level, earning money. The enemy, of course, will also strengthen the attack and weapons. Very solid and interesting shooting game.