Tournament ties?

What happens when you play in a tournament and you have more than two players with the same amount of points at the end? Is there a playoff, or some formula that determines the winner?
The winner of this group will play the winner of the other group for the title.

The players tied for first in each group will all advance. Then they are distributed into the appropriate-sized groups as evenly as possible, adding extra players to some groups if necessary (for example, if you wound up with an odd number of players in a round of a duel, there would be a group of 3).

In your example, with just 3 players left, they would all be in a single group, playing for the win. If there were to be another tie, more rounds would be added until there was a single winner.