While they may be most useful during a math test, TI calculators can also play a handful of classic video games.

All the Latest Game Footage and Images from Calculator: The Game Welcome to Calculator: The Game where you'll manipulate numbers by adding them, subtracting them, converting them, reversing them ...

A 20-year-old college student has rebuilt Portal, Valve's 2007 space-bending game, from the ground up, on—wait for it—a graphing calculator. In a display that puts the old calculator versions ...

So far, so ordinary, but the highlighted clip shows the game being directly controlled by a TI-84 Plus CE graphing calculator, complete with a 2 FPS on-device video stream.