Go-moku is a very tactical Japanese board-game. Ofcourse it's lots better on a real board, but I tried to make a simple version on the TI-80.
You have to get 5 stones in a row, and also obstruct your 'enemy' to have 5.
First, it'll maybe annoying because you have to put the stones on the intersections of the lines, so if you select a point in the middle of a square it won't work.

This go-moku game is for 2 players (because the A.I. is very difficult to make here on the TI-80, and it would take LOTS of memory, but if anyone can make it, just do it). The little square indicates the color who's turn it is.

For questions, mail me and if youthink you're the champ and wonna fight a computer, download a go-moku game. (I think you can find a good one on www.download.com)