Class.io: A Two-Player Game is an Android arcade game developed by PuzCharm. The game is a hand-speed battle between two players playing as deskmates in a classroom. The players must take advantage of the moment when the teacher turns his head to write on the blackboard and try to gain points by pressing the button to gloat at the opponent. However, they must be careful of the teacher turning back and the sudden appearance of the principal outside the window.

The game has a short time and fast pace, making it a reflex and speed test for the players. The game also offers interesting scene settings and contagious sound effects. Players can choose their favorite weapon, character, and class before the start of the game. The player with higher points at the end of the time wins.