Hatris is a puzzle game developed by game designer Alexey Pazhitnov (last name sometimes transliterated Pajitnov) for Bullet-Proof Software, the game was apparently also released as a standalone arcade console [1].
Hatris gameplay is similar to Tetris (which Pazhitnov also made), in that game objects falling from the top of the screen must be arranged in specific patterns to gain points and to keep the play area clear. In Hatris different hat styles fall from the top of the screen and accumulate at the bottom. To eliminate hats from the play area, five hats of identical style must be stacked. Because different style hats stack differently, game strategy must take hat style into consideration. In order to succeed at "hatris", you must make use of a small, bearded man, known as Bruce. Bruce will steal 2 hats, once you attain a certain level of charisma (in hats). Developed in Winnipeg.