Lock delay, wall kick, and hard drop are not present.ĭespite the title's popularity, its Delayed Auto-Shift (DAS) mechanics were not well-understood until player Kitaru analyzed its internal memory values. The rotation system is a right-handed Nintendo Rotation System. The name of this hack is "Tetris Zero" and it can be found here. However, a resourceful hacker by the name of infidelity has hacked the ROM to provide complete support for, and access to, a 2 player mode along with a few other improvements. Both game types have empty high score tables.A-Type setup/high score screen is missing a large chunk of tiles.Crashes to copyright screen when game is over.Music alternates between fast and slow when one player nears the top of the playfield.Next piece displayed in wrong location.Standard 1P mode screen layout is always used (no 2P mode layout exists in the ROM).While the basic rules are in place and the game is "playable", there are numerous issues: By setting RAM address $BE to 02 (or using Game Genie code VUXEILXX) one can activate this unfinished mode. However, the ROM does contain support for a 2 player competitive mode. This version of Tetris does not present a 2 player mode to players. As a result, the Tengen game was only on the shelf for four weeks before Atari was legally required to recall the game and destroy any remaining inventory of its NES version. After much legal wrangling, Nintendo itself ended up with the rights to publish console versions of Tetris, leaving Atari with only the rights to arcade versions. However, there were issues with the title's publishing rights. Nintendo's NES version lacked the side-by-side 2-player option featured in Tengen's version.Ītari Games, legally owning the rights to manufacture an arcade version of Tetris, later ported the game to the NES and released an unlicensed NES version in 1989 under its Tengen brand. This version sold 8 million copies worldwide. Although two versions of Tetris were published in the United States, Nintendo's version was the only version that was properly licensed for distribution. Tetris (Russian: Те́трис, pronounced ) is a Russian tile-matching puzzle game, originally designed and programmed by Alexey Pajitnov.
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