Viewers noted the "Valve" on the back of Chio's head during her "gaming mode," a clear nod to the video game developer.
Chio's habit of staying up late playing Western video games (specifically a parody of Splinter Cell or Hitman ) leads her to believe she can use stealth tactics to avoid being seen in public after an embarrassing social encounter. Her "stealth" attempts, however, result in increasingly chaotic and awkward situations.
The exaggerated portrayal of Kabaddi as a semi-martial art/groping sport was both hilarious and confusing to viewers unfamiliar with the actual game.
If you're looking for where to watch or read more, reviewers on Apprentice Mages and other platforms often praise the voice acting performance for perfectly capturing Chio's neurotic energy. [Spoilers] Chio-chan no Tsuugakuro - Episode 3 discussion
The third episode of the comedy anime (Chio's School Road) continues the protagonist's bizarre and often extreme attempts to navigate her daily commute to school. Episode 3 Summary