That would vary by sport.
Well... speaking game wise~ A full game is 90 mins. But... You can go into two periods of over-time and penalty kicks if there is still no goal scored. Most likely 120 mins is the longest time ツ
20 overtimes
the whole game
The game where you get people to stay quiet for the longest period of time, the silent game.
The longest recorded time someone has bounced a ball continuously in the air is over 6 hours.
Probably Ocarina of Time because it has the most dungeons.
new Orleans
how does soccer game changes over time
50 hours by Jason Campbell
47 hours
Some people have TF2 in the thousands (I have 298 HRS)
That would probably be Elder Scrolls 3: Morrowind If you complete absolutely everything in the game, you will have to invest over 1000 hours of gameplay. That's equivalent to a full time job 8 hours a day for 6 months.