ZTetris

About

ZTetris is a puzzle game that turns TI calculators into portable Tetris machines. Players stack geometric blocks to clear lines before they pile up, choosing between solo challenges or head-to-head matches. The game works on multiple Texas Instruments models, letting you compete or play alone with 21 difficulty levels. Its standout feature is the two-player link mode, which connects any TI graphing calculator. It also has 16 background patterns, a teacher key to pause gameplay, and trash line penalties to spice up matches. Programmed originally for the TI-85 in 1996, it became a community favorite with ports to every compatible model. The top three scores are saved with names, adding a layer of competition to each session.