Moomoo.io is a RPG themed io game where you need to work to get resources and build yourself a village. But building a village is not that easy, other players will try to kill you, once your village is built, protect it at all cost. So make sure you get the resources fast, get better equipment and avoid being killed. You can move around using WASD and hold your left mouse button down to perform an action.
Mope.io allows you to choose between a Mouse or a Shrimp. You hunt for food and as you eat, you will get experience, once you level up, your animal will evolve into something bigger. You mouse around with a mouse and use Space bar to boost your movement, this is good for hunting other players as well as getting away from them. You can't each all animals, there are certain types of food your animal can eat.
Skribbl.io is a different kind of io game, it's a drawing game where you have to guess as soon as possible if you recognize the others drawings. One click and you are already in a game and ready to type the answers. You can choose between 3 words if it's your turn to draw. Round based, at the end the highest score players win. Really fun and relaxing game. Automatically adds new players into the game room if someone leaves.
Agar.io game is a simple game where you basically eat others and get bigger. You are a small ball at start and you move your mouse around the screen to control your ball. At first try to avoid everyone and just try growing bigger by getting some computer generated balls. Once you are bigger, try finding bigger balls that move around, just make sure they are not bigger than you, because then they would eat you instead. Grow as big as you can get without dying and repeat.
Horder.io is a level based IO game, you can choose between Warrior, Mage, Shaman and Archer. So insert your name and choosing between melee, ranged and healer type and you are in the game. This is a 3D type IO game, has MMORPG elements. Gather gold, get better weapons and gears and PvP against others. Move around using WASD and turn the screen using your keyboard arrow keys.
Starve.io is sever based, max 99 players per server. You have 3 things to worry about: Life, food, cold. Hunt animals like rabbits to get food because if you are hungry, your life points are starting to decrease. Find a fireplace to warm yourself up at nights and watch out for monsters. Move around with WASD and point the mouse towards your enemy and left click it to attack. You can also gather resources, like wood for example.
Wings.io is a fighter jets shooting game. Fly around and get bonuses that are falling from the sky above in parachutes. One of the most fast paced IO games, where your reflexes are tested. Try shooting down other fighters and avoid being shot down yourself. You move around the sky using only your mouse and clicking or holding down left mouse button. You can choose to fire with Space as well.
Control your pirate ship and collect coins. Watch our for other pirates as they might not be friendly. Upgrade your ship's speed, attack power and other attributes to fight back. If you destroy another pirate ship then a lot of gold will drop depending on how much the other person has collected coins. From time to time you can boost your speed to get away from a bad situation by dropping off weight from the ship using Space Bar. The more cold you get, the more powerful your ship can be upgraded.
Slither.io is a snake and io games combination. You start as a tiny snake and eat all you can. Once bigger, try cutting off other smaller snakes to grow exponentially bigger. The beginning is very difficult since there are very long snakes out there and if you run into them - you are done. This is the most popular IO game after Agar.io and has a lot of players and competition.
Diep.io is a shooter type IO game. Move around with keyboard(WASD) and point the mouse in a direction you wish to shoot. You can shoot random objects to gain levels to become more powerful. After being powerful enough, hunt down other players by shooting them and gaining levels faster. Watch out for the opponent's bullets, you can avoid them by moving away from them.
Bonk.io is a fun and very competitive IO game. Round based, each round has a different map, you need to be the last one to survive in order to win the round. Move with WASD and press X to make yourself heavier. As you have to survive in unique environment each time, it really makes the Boring go away. You can even create your own unique maps and play there in multiplayer against others.
Wormate.io is a snake based IO game, you eat junk food to gain more weight and length. The final score depends on the snake's weight. If a snake dies, then all the food will be available for others to eat. Make sure you don't run into other snakes who try to cut you off. Moving is fairly simply, just move your mouse across the screen, although you are in constant movement, you can't stop your snake.
Warin.space is a Sci-Fi themed IO game. You choose between Blue and Red team and a Region. Very action packed wars since it's not individual, but rather how you work with the whole team. Attacking and movement all done using your mouse, hold to attack, move cursor closer to your ship to make it stop moving. Spaceships get more awesome the more you attack.