Cosmo.sx is one of the interesting MMO 2D shooter games. Control a type of the substance and try to create an orbit as well become a perfect planet quickly. Roam around the playing field and collect the item to grow and level up. Aside from that, shoot other opponents to gather skill. Finish stages and survive to reach the top spot and dominate the leaderboard. Don’t run into any black hole for survival! Play and see if how long you will win!