| Welltris | |
|---|---|
 | |
| Developer(s) | Doka Sphere Bullet-Proof Software |
| Publisher(s) | |
| Designer(s) | Alexey Pajitnov Andrei Snegov |
| Series | Tetris |
| Platform(s) | Amiga, Amstrad CPC, Atari ST, ZX Spectrum, Commodore 64, MS-DOS, Macintosh, Arcade |
| Release | 1989: MS-DOS 1990: Amiga, Amstrad, Atari ST, Mac 1991: Arcade, C64, Spectrum 1992: PC-98 |
| Genre(s) | Puzzle |
| Mode(s) | single-player |
Welltris is a puzzle video game, developed by Doka and licensed to Bullet-Proof Software. It is an official game in the Tetris series. Adaptations were made by Sphere, Inc., for Spectrum HoloByte, and by Infogrames. It was released for MS-DOS compatible operating systems in 1989. Ports for Macintosh, Amiga, Amstrad CPC, and Atari ST followed in 1990, then ZX Spectrum and Commodore 64 in 1991.