Triple Elimination tournaments are very similar to double elimination tournaments, except for the simple fact that you must lose 3 games before you are eliminated as opposed to two games in double elimination.
In the championship game, the team coming out of the second loser's bracket must beat the team coming out of the Winner's Bracket/First Loser's Bracket either 2 or 3 times based on the number of losses they already have. If the team is coming straight out of the Winner's Bracket and has not lost a game, then they must be beaten 3 times in the championship. If the team coming out of the upper brackets has already lost one game, then they must lose only twice in the championship.
If all the possible games are played in a triple elimination tournament there would be exactly 3 times the number of games as there are participants in the tournament.