4GRAVITY!

This game is a "Connect Four" clone. It is a two-players, one-player and zero-player connection board game, in which the players take turns dropping colored tokens into a seven-column, six-row vertically suspended grid. The pieces fall straight down, occupying the lowest available space within the column. The objective of the game is to be the first to form a horizontal, vertical, or diagonal line of four of one's own tokens.

This game has been programmed from a single source code for every platform by using ugBASIC, a BASIC dialect specialized in programs that are very efficient "by design" on various 8-bit platforms, without the need for "fine tuning" them and without compromises of other dev-kits.

The game participates in the "Forza 4" Challenge of the RetroProgramming Italia - RP Italia group. This is an Open Source software, and sources are available here.