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Platform(s)Microsoft Windows
(tested to run on XP, but not Vista)
ReleaseFebruary? 2003 (First release)
Latest release1.00 (2004-09-06)
Gameplay info
Next pieces0-3, 25
Hold pieceNo
Hard dropUsable in HARD, ADVANCE, and FINAL levels
Rotation systemDTET Rotation System
DTET title.png
DTET ingame.png

DTET was a fan game created in Japan with the goal to create the author's own vision of Tetris, different from both the guidelines or TGM. It implements many rule elements that are not seen elsewhere, such as symmetric wall kick (elaborate?), double rotation, a huge number of previews, and on-demand ARE canceling (There is no line clear delay in ADVANCE and FINAL levels).

The game's control system consists of 2 rotate buttons, unlike many other Japanese games which feature a duplicate button for one of the directions (usually counter-clockwise). This potential drawback is overcome as follows: When a piece is rotated, and the other rotate button is presssed while the first button is still down, the piece rotates an extra turn in the direction of the first button, for an overall 180 degree rotation, otherwise known as a "double rotation". One can also produce an instant double rotation (treated as counterclockwise for wallkick testing purposes) by hitting both buttons simultaneously.

Game modes

DTET features score attack, time attack and battle modes, as well as two special ("FINAL") modes.

Score attack is a mode where getting a certain number of lines (usually 8, sometimes more in HARD mode) increases the level, and the objective it to survive as long as possible and get the highest score possible. The player has five lives in this mode, and should the player block out, they will lose one life and keep going until they run out of lives.

Time attack is a mode where the player must clear 100 lines at the maximum level for each mode, with three lives. Clearing all the required lines without losing a life will give the player a Perfect.

Battle modes are where the player faces off against other players (over LAN) or against CPU opponents. In the Official Battle menu, the player can choose the AI strength and game difficulty (mode and level).

FINAL modes are expert-only modes. Joker starts at level 50 with the highest gravity where each line clear increments the level counter. Quadruples add one to the stock. The "stock" counter determines how many non-quadruple line clears they can perform in level 200 and beyond. At level 200, quadruples will only count toward the current level, and any other line clear decreases the player's stock by 1. Once the player's stock reaches 0, the game ends. If they manage to playing until level 300 with at least 1 stock, they can continue on as long as they have stocks. Players only have one life in this mode. Furthest is a hard 20G challenge where players have 10 lives to clear 300 lines. All of the delays in this mode are incredibly short. Both of these modes blend the pieces in with the background, only showing an outline of the stack.

There are three different modes which can be applied to the score attack, time attack, and battle modes. In each, there is a drop in gravity at level 20 as well as level 40 (except in NORMAL, where the game never reaches 40). Levels 50 and up are 20G.

NORMAL mode caps off at level 30. The hard drop option is unusable in this mode.

HARD mode caps off at level 50. In score attack, the number of lines per level steadily grows over the course of the game. Level 50 requires 500 lines.

ADVANCE mode has a time limit located at the bottom of the playfield, and caps off at level 200. Line clears will restore the timer, and if time runs out, the game will end instantly, regardless of the number of lives the player has. In score attack, each level past 50 is earned with one line clear.

See also