Recently I found a IO game, it's my first playing this game! I feel it's so cool! Heroic Shooter Heroic Shooter is the IO Arena game on the H5 platform. Single-player mode and Team mode are the main ways to play, In addition to the fast-paced, strategic, teamwork, and diverse hero selection of traditional competitive games, Heroic Shooter adds the Pet system and Gene Modification system, adds Hero Mutation, Personal Survival Battle mode, and enriches player gameplay content and strategy selection. It's launched by InstantFuns platform.
According to Wikipedia-sensei, io is registered to British Indian Ocean Territory. This is probably a political game.
Io games are a series of real-time multiplayer games of which the name ends in ".io". For people who are not sure what OP is talking about.
NUF profile Home page leads to the game, posted a blog talking about the same thing. Seems like the answer is YES.