Simply press ENTER at the screen asking for a code. The game has been modified to not require the code word. Also For Amiga, Amstrad CPC, Atari ST, Commodore 64, Macintosh, PC-98, ZX Spectrum Developed by Doka, Sphere, Inc. Published by Spectrum Holobyte, Inc. Released 1989 Genre Action, Puzzle Gameplay Falling Block Puzzle Perspective Top-down Interface Direct Control Visual Fixed / Flip-screen Description Welltris , which is the first Tetris sequel, is originally designed by Alexey Pajitnov (the creator of Tetris ) with Andrei Sgenov . It has the same gameplay concept as Tetris ; simply all the player has to do is to rotate and maneuver the falling pieces into a proper position in order to form complete layers in the rectangular playground. But Welltris changes this rectangular arena into a four sided well with grid-like walls and bottom where the falling pieces can be moved from wall to wall within the well. Form the pieces into solid rows either horizontally or vertically on the bottom of the well. Billed itself as Tetris in three dimensions. From Mobygames.com. Original Entry