TINT
Tetris clone for the terminal
TINT Is Not Tetris(tm) ...at least the name isn't.
As the title suggests, this is a clone of the original tetris game written by Alexey Pajitnov, Dmitry Pavlovsky, and Vadim Gerasimov.
The game is as close to the original as possible, but there are a few differences. Nevertheless, it's probably the closest to the original that you'll ever find in the UNIX world...