From Hard Drop Tetris Wiki
Galois is an open-source Tetris-like game in which the pieces come in a variety of shapes and sizes. In the game preferences, the player can select to play on a 2D board with polyominoes, polyhexagons, or polytriangles, or on a 3D board with polycubes. Additionally, the player can select the size of each piece. For polyominoes, pieces range in size from two squares (dominoes) to eight (octomonoes).