If I had to choose which of the 3 game situations are the most intense, I think I would have to choose tie game but with a caveat. I think the most tense situation is a tie game in the dying minutes of the game. Obviously overtime is also very tense because next goal wins but the dying minutes gives you so much time to potentially end the game or have the game ended on you. You can score a goal and have only a couple minutes to defend to take the W. If you give up a goal, you're playing catch up with time running out. With the other two options, you know what the end goal is. With a tie game, the game is always evolving and changing. So with that, I think by far a tie game in the dying minutes is the most tense and causes the most anxiety of any game situation.