If the parties get off track, redirect them to talking about the game. Redirection can be as simple as saying "Let's get back to talking about the issue at hand"
If you hear something productive that one party says, emphasize that point to the other party
Structural Conflicts: Often overlaps with interest and relationship conflicts. May arise if there are disputes about game mechanics or the relative experience of player
If parties and mediator can create creative solutions that are outside of the bounds of the game, more likely to move past issues and keep the game going