Deeeep.io is a free online multiplayer .io game similar to Mope.io. It is set in an ocean, the world of countless strange and mysterious creatures. You will start off the challenge as the animal that you pick out on the screen. The mission is to dominate the leaderboard and take over the map as soon as possible. Because you are at the lowest position of the food chain, you have to attempts to climb up to the higher spot to get stronger and increase the chance of survival. In the underwater environment, you should eat to earn experience and evolve while trying to defend from predators. Also, you need to keep an eye on the oxygen meter if you are a seagull. Good luck!