In Dirty Humans, the ocean is under threat from pollution, and it's up to you to help clean it up. As you swim, you'll encounter fish trapped in human-made waste, as well as garbage items floating through the sea. Your task is to rescue the fish and remove the trash, cleaning the ocean as you go. The leaderboard tracks how much trash you collect and how many fish you save. The more you clean, the better your rewards, including permanent upgrades that make your octopus faster and more efficient in polluted waters.