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Cosmo.sx is a free online unblocked game where you will play against multiple people. So as to dominate the leaderboard, you'd better remove as many players as possible. Move around the map and deal damage to planets to collect resources. Materials you have obtained will help you pump 8 skills. Besides, you need to shoot down the enemy to rank up. Don't get close to any black hole along with stronger opponents! Let's explore the combat and conquer the top spot now!