Tengen Tetris (Prototype D)

A prototype of Tengen Tetris for the NES.
==Notes==
* Has a different and more basic-looking intro screen. Blocks fall from the top of the screen to slowly reveal the logo.
** There are no fireworks on this screen, in this version.
** The copyright text shows as "(C)1988 TENGEN." instead of "(C)1988 TENGEN".
* The screen border is visually very different, and is green and red instead of blue.
* Main menu has a slightly different logo to the one used in the final.
** The differences in the Tetris logo also carry into the gameplay HUD.
* The main menu has an extra line of licensing info:
 LICENSED BY
 NINTENDO OF AMERICA INC.
* The handicap select shows "AUDIO BY BRAD FULLER" just as the music select normally would - however, there is no music select in this version, as only one track (Bradinsky) plays in-game.
** The music sounds a bit different throughout.
* The credits in the menus have differently spaced lines, and the text is white instead of orange.
* The HUD at the top of the screen in the menus is wider than in the final game.
** Additionally, the rows are "HIGH SCORE", "SCORE" and "LINES", rather than "SCORE", "LINES" and "LEVEL".
* The menu sound effects differ from the final.
* The blocks all have a different look, with each block being represented by a unique pattern. The blocks look much more primitive than they do in the final as they lack defined borders or a 3D design.
** The block stats on the right half of the screen do not feature images of the blocks underneath; instead, they're identified by that respective block's unique pattern.
* The "STATS" text is lower than it is in the final.
* The "HIGH SCORE" is set to 0 by default instead of 17000, and the high score in the HUD is placed a bit differently to how it appears in the final.
* The "PAUSE" text does not have a red border around it, in this version.
** In co-op mode the "PAUSE" is placed to the right side of the screen, for some reason.
* The "GAME OVER" text has a blue border instead of a red one.
* There are no Russian dancers or bonus screen each level increase - instead, the game continues as if nothing important had happened. 
** Also, the level increases every 10 lines, instead of every 30.
* Blocks hold the same colour and pattern when they drop, rather than changing to a different colour like they do in the final.
* The block dropping sound differs from the final.
* Blocks often cannot be turned when they are pressed against the wall.
* There is no high score screen after gameplay.
* Score numbers for individually placed blocks are always white instead of appearing in multiple colours.
* Lines clear instantly without any visual effects.
** Unlike Prototype C, when multiple lines are cleared they all disappear simultaneously, like Prototypes A and B.
** They also do not show text indicating how many lines have been scored ("SINGLE", "DOUBLE", etc).
** The blocks do not clear from left to right as they do in the final, instead all blocks in a row clear simultaneously.
==Screenshots==
Tengen Tetris (Prototype D) 2021-05-21 14-43-59.png|Title screen
Tengen Tetris (Prototype D) 2021-05-21 14-43-44.png|Title screen
Tengen Tetris (Prototype D) 2021-05-25 01-10-33.png|Main menu
Tengen Tetris (Prototype D) 2021-05-25 00-57-36.png|Main menu
Tengen Tetris (Prototype D) 2021-05-25 00-58-32.png|Gameplay
Tengen Tetris (Prototype D) 2021-05-21 14-47-32.png|Gameplay
Tengen Tetris (Prototype D) 2021-05-25 01-09-18.png|Gameplay
==Files==
==Acknowledgments==
Special thanks to Frank Cifaldi at the Video Game History Foundation and the anonymous donor for this part of the lot! A huge thanks to Hwd45 for researching this prototype! 
==See also==
* New Years 2022 (January 1, 2022)
* The Cutting Room Floor (TCRF)
* Internet Archive (IA)
* Video Game History Foundation (VGHF)