Blox

Some games are both so compelling and so relatively straightforward to implement that programmers are driven to duplicate them upon first sight, if only to have a version to play at home. So it is that after his first round of Tetris, British programmer Graham Cluley was driven to hash out his own serviceable keyboard-controlled clone of the original falling-block megagame, never pausing to even confirm that his version had the same column-width as the standard version does. If it failed to take over the world, it's only because by '90, the market was already flooded with homebrew Tetris clones.