4GRAVITY! has been re-released!

A new re-release of 4GRAVITY!, a  game written in ugBASIC and that runs on various 8-bit home computers like ATARI 400/800/XL/XEGS, Commodore 128 (8502), Commodore 128 (Z80), Commodore 64, Commodore 64 with REU, TRS-80 Color Computer 1/2, TRS-80 Color Computer 3, Amstrad CPC 664, Dragon 32/64, MSX, Olivetti Prodest PC128 and Commodore VIC-20.

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 cross-platform game would not have been possible without using ugBASIC: it is an isomorphic language and it has cross compilers that works on Linux and Windows. With a single source code you can obtain programs for multiple retro computers, even very different from each other.