Connect 4 was quite a tactical, thoughtful, plotting type game involving a vertical playing area filled with holes, and 42 yellow and red disks.
You dropped the disks down into whichever column you fancied, and tried to make a line of 4 of the same colour.
This would have been quite easy, if the opposing person didn't have different coloured disks, which they in turn dropped near to yours to block you.
The idea of the game was to create a line of 4 of the same colour disks in any direction - horizontally, vertically or diagonally.
It didn't count if you made a line of 3 up to the very edge, then hold up an extra one outside the playing area. That would be cheating and would certainly be frowned upon in Connect 4 competitions.
Then, after the winner had successfully created a line of 4, there was much celebration, the bottom of the playing area was moved and all the disks cascaded out onto the tray. Some rolled under the couch, while others were prone to just plain disappearing. Top game.