It's not a five player game either. There simply are not enough adventure spots, replenish cards, experience counters, or time to make this a viable game for 6 players. The first couple of turns determine which two players are in the running to win. Everyone else won't have enough adventures to catch up or counters to level up with, and must spend the next 5-6 hours waiting for the game to end. In fact, games with more than two people can be just as painful, for the same reasons, but for shorter amounts of time.
This observation comes from someone who always played Runebound with 2 players only, tried once with three and felt 2 was much better, and lost and entire day of his life playing with 6. I will never play this game again with more than 2, and the others who were eager to try the game out or remember what they liked about it now hate it and don't want to play ever again/want to sell their copies. I'm disappointed because it's a good game. A good 2 player game. Now destroyed for many because some decided the box should incorrectly state it supports 6 players when it doesn't.