Tetris DX

Tetris DX
Developer(s)	Nintendo
Publisher(s)	Nintendo
Platform(s)	Game Boy Color
Release	21, Oct 1998 (Japan) 31, Oct 1998 (USA) 1, Jul 1999 (Europe)
Gameplay info
Next pieces	1
Playfield size	10x18
Hold piece	No
Hard drop	No

Not to be confused with Tetris Deluxe, a game released for western mobile phones.

Tetris DX was a Game Boy Color game as an enhancement of Nintendo's original Game Boy Tetris, with two added gameplay modes (Ultra, lasting 3 minutes; and Vs. CPU, a match against the computer), a profile/save feature, and color graphics on Game Boy Color and above. In addition, the game's rotation system had a glitch which lets a player move any tetromino except O upward by holding the direction against a wall while rotating in the opposite direction.

Rotation system

All rotation states of all seven tetrominoes in SRS. From top to bottom: I, J, L, O, S, T, Z. The circle doesn't appear in the game; it helps to illustrate the axis on which each tetromino rotates. Colors differ between SRS and TDX. Notice that at least J, L, and T tetrominoes start oriented like the third column.

The rotation system is an early version of what would become SRS. Tetrominoes of width 3 rotate as if in a bounding box, though L, J, and T start flat side up. first tries rotation about the center of the bounding box (the white circle in the SRS diagram), then rotation about the bottom of the bounding box (the space above the white circle in the third column)

External links

• Koryan's description of Sega Tetris, TGM, and Tetris DX rotation systems (Japanese language)
  • English translation using Google Language Tools