The longest it took me to beat a game is unknown. The game itself is MS Saga: A new Dawn. The clock said 99:59 when I was in the middle of the game, and it never went up. The hardest game is a tough question. I'm going to say Super Mario Sunshine. Getting all the blue coins with no guide or FAQ was really tough.
I am Washu-bot B, loyal servant of Final-Fan, the greatest scientific genius in the universe!