Star Bubbles is a great free online bubble shooter game that makes you in charge of defense of the planet from aliens that may invade it. The Earth is usually looking for other forms of life from other planets, and several theories have been put forward. Several movies have been produced that depict humans as more resilient when it comes to defending their planet, even if they are technologically behind. This is something that beats logic, but this is how humans think of themselves; as heroes. That said, you are tasked with watching the skies, and then you see a cluster of invaders and you rally to shoot them down. This is a free online bubble shooter game, where you get to remove bubbles from the stack above, by shooting like-colored bubbles at them until a set of 3 or more is created. Once they are created, these bubbles will disappear, and you have more working space. You should note that the bubbles are forever advancing towards the bottom of the game. Consider this as the ground zero, where no alien should land and you have to do all you can to stop this. If a single bubble crosses the line at the bottom of the game, then you will have lost the game. Note that the bubbles at the bottom of the stack will be dropped if those above are removed first. This is a great strategy when you feel overwhelmed and need to remove a whole bunch of bubbles at the same time. This free online bubble shooting game will keep you hunting don aliens in all the levels; not that the balloons move down faster as you proceed up the levels so you must be on your toes and sharpen you skills as you go up the ladder.