I once considered myself good at Tic-Tac-Toe. I was arrogant. I couldn't be beaten. This game.. proved me wrong. I've improved dramatically while playing this game, and still- the same strategies it uses to beat me, never will work on it. I sat here playing for a long time, and even though I can't win against that impossible mode yet.. it's winning less and less with each game that passes. Whether you're good at Tic-Tac-Toe, or even if you're not- it's one of those games that can't really be enjoyed without a partner, and this game gives you a partner that knows it all... I hate that guy.. AI.. program.. whatever!