I haven't played video games from last 3-4 years but when I was teen, I loved to play Prince of Persia especially that trilogy one. Looks like Ubisoft now stopped creating new Prince of Persia games and now concentrating solely on Assassin's Creed. But POP has too much nostalgic value for me. Even you can try that game, it may not have fancy graphics like today's games have but it is still very enjoyable and available on web for free.