City Siege 4
That's the fourth part of an excellent tactical shooter City Siege 4 game, which is called "City Siege 4: Alien Siege". Quite right, the word "Aliens" in the title means that the topic of the new game was the aliens. You have to form your own team of aliens in order to successfully pass the levels that the game offers. You can buy new types of soldiers, improve old ones, buy all sorts of abilities, like a periodic blow from the air. Some tasks are to be solved by a certain type of soldier, so they always have to switch between them.