Tetris

Tetris is a tile-matching video game created by Soviet software engineer Alexey Pajitnov in 1984. It has been published by several companies for multiple platforms, most prominently during a dispute over the appropriation of the rights in the late 1980s. After a significant period of publication by Nintendo, the rights reverted to Pajitnov in 1996, who co-founded the Tetris Company with Henk Rogers to manage licensing.

In A Growing Concern World they are found in Charon's region only, first appearing in Fireball to Tetromino, however they can't be eaten in that level. The first level where they can be eaten is Tetras the Day.