|Release date(s)||March 22, 2017|
|Playfield dimensions||10 × 20|
Tetris MicroCard is a credit card sized handheld Tetris game based on the Arduboy. Unlike the Arduboy, neither the hardware or software is open source.
There is one game mode, a basic endless marathon style game. The player can start on any level from 1 to 15.
The game implements the Tetris Guideline game over conditions. There is a bug that causes the game when regular play should still be possible. If the stack reaches the 20th row and the next piece to appear connects to the stack on its first frame, the game will end.
Scores over 10 million are saved and ordered on the local leaderboard correctly, but do not display the most significant digit.
Tetris MicroCard developer, Kevin Bates, originally planned to have two onboard chips that a user would be able to switch between, one to play the official Tetris game, and one for user programmed games. After some delays the original shipping date of August, 2016 was pushed back to March, 2017, and the two chip feature removed. Despite this, some review copies and early prototypes of the two chip version exist. Bates stated the reason for the removal was that units would die due to interference between the chips.