A rotation system broadly represents where and how tetrominoes spawn, how they rotate, and what wall kicks they may perform. Different rotation systems exist through a broad spectrum of games, some having their own unique system, others in a series may change only a little. Notable systems:

• Original Rotation System, used by the first Tetris games. Also called ORS.
• Super Rotation System (or SRS)
• Arika Rotation System (or ARS)
• Sega Rotation System
• Nintendo Rotation System
• DTET Rotation System
• Any rotation system created in NullpoMino due to its various customizations offered. You choose both the rotation stages for all the tetriminoes (fully customizable) and the wallkicks (only from built-in ones).

Some are not included above, but shown below.