Tetris: The Grand Master 3: Terror Instinct is the third game in Arika's Tetris: The Grand Master series, which tests the limits of a player's Tetris ability. The series treats its highest rank - the titular Grand Master - very seriously, and each successive game adds more requirements to reach that level. Terror Instinct ups the ante even further with even stricter prerequisites to reach the esteemed rank, to the extent that only a handful of players have ever achieved it.
While the game remains an Arcade and Japan exclusive, it has been gaining some notoriety with its appearances on speed run streams. It was released in 2005, on Taito's Type X hardware.