Vili.io presents itself as a highly engaging and addictive multiplayer online IO game focused on the theme of fidget spinners. Firstly, enter a chosen nickname, select a desirable skin, and then start your spinner. Navigate across the screen to gather food items, and this will make your spinner rotate at an increasingly faster pace. For each piece of food collected, the rotation speed of your spinner will increase by 1 RPM. However, remember that every 5 seconds, the rotation speed will decrease by 0.1 RPM. So, stay active to avoid your spinner gradually coming to a halt.

Portal 2 Coop is another delightful installment in the cool and highly addictive multiplayer online game, KoGaMa. This challenge lays great emphasis on teamwork. Your goal is to advance as far as possible by traversing through portals that are opened by simultaneously pressing two buttons. Thus, for each portal to open, you'll have to rely on the help of another player.

Staroyale.io offers an incredibly exciting Star Wars-themed battle spaceship IO game. Here, you are obligated to pilot one of those astonishingly swift vehicles and eliminate your adversaries without getting hit. It is a game filled with high speed and intense action, and it is completely free to play online.

Kogama Festival Park serves as another outstanding addition to the multiplayer 3D game series known as KoGaMa. Here, you once again take on the role of guiding that adorable little character across a lively field filled with numerous other players. You can interact with them in various ways.

Tetrads.io offers an extremely captivating multiplayer IO gaming experience centered around Tetris bricks. The main goal is to match these bricks with others, thereby creating the largest structures within the game field. It's as if all those Tetris squares have gone a bit crazy and are now competing fiercely with each other to see which one can attach the most bricks to itself.

NuggetRoyale.io offers an extremely entertaining experience. Enter a box filled with those adorable baby chicks. Put in your best effort and strive to endure for as long as possible before transforming into a delicious chicken nugget.