About С21A — Gameplay & Story
In the new online game C21A you will take part in an unusual mathematical competition. In the center of the room there are cats sitting on the screen, next to which the number 21 is displayed. Your main goal is to reset this indicator. To complete the task, use the panel at the bottom of the screen, where food with different numbers constantly appears. You need to select it with a mouse click and pass it into the hands of the characters. Each such action in C21A subtracts the chosen denomination from the number next to the cat. Once you reach the exact value of zero, the level will end in success and reward points will be credited to your account. Carefully select combinations of numbers to complete the task.
Platform
Browser Desktop , Mobile and Tablet
Release
27 december 2025
Last Update
27 december 2025