Tic Tac Drop from Windows Entertainment Pack 4

This was released 1992 and originally made for Windows 3.x.

This game is just like Connect Four, aside from having an additional two unique board layouts, including a triangle and a "plus" shaped board.

The following are the instructions copied directly from Help - How to Play - Overview:

If you were on a slow spaceship heading for a distant planet, this is one of the games you should have aboard. It's as if tic-tac-toe were created centuries ago in anticipation of a computer version that would make the game even more fun to play. In fact, rumor has it that Tic Tac Drop was dropped into the laps of scientists searching the heavens for signs of intelligence. No matter what the story, Tic Tac Drop is a soothing, thoughtful, and less frantic alternative to the usual pace of daily life. And, especially when working with a large number of rows and columns, it provides a tremendously enjoyable analytical exercise.

Tic Tac Drop offers more than 150 game configurations. You can customize your own boards by choosing the number of columns and rows you want, the shape you want them in, and the parameters required to win. You can play against yourself, another person, or the computer at three different skill levels.

Tic Tac Drop is a tutor, too. Build the most complex playing grid you can, and then choose Demo from the Game menu. Watch as the computer plays against itself and learn from the strategies it engages.

Enjoy!