Rider.io is an online multiplayer racing game where you can race other players in a futuristic world. In the game, you will be challenged by AI or other real players on an endless playground filled with obstacles and surprises. It is an intense game where the goal is to get to the finish line fastest while avoiding obstacles. It provides a fun, thrilling experience and has a variety of levels that become increasingly difficult as you progress. The game also has an energy bar that needs to be managed in order to get through the levels safely.