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 for the 28 rotation stages and the wallkicks (only built-in wallkick settings, you cannot add or remove wallkick settings (one of the very few cases of NullpoMino not being customizable)).
• Tetris Best rotation system. Also called TBRS.
  • Tetris Best 2 rotation system. Also called TB2R.

Some are not included above, but shown below.