In a free-for-all game, if I make a deal with another player where we agree 'I will do X if you do Y', is that deal binding according to the rules?

Ruling: Deals between players are not binding according to the rules. There is nothing in the rulebook that compels players to keep their word; it relies on social contract and trust.

Nuances:

• Breaking deals can build a bad reputation and discourage others from playing with you
• Backstabbing has been explicitly mentioned as an option in free-for-all games
• Tournament rules and player etiquette guidelines may be added in the future