CONTACT RULES

The defender is thinking of a secret word. They reveal the first letter of it (and will later be forced to reveal more).
Their goal is to last as long as they can by "defending" against people guessing the word.

Everyone else in the game is an "attacker".
They give clues to words starting with the revealed parts of the word. For instance, if the defender has given up COM so far, clues may be for COMPUTER or COMA.
(Clues can be *anything*, not just crossword-style clues. For instance, I once used "This" for CONTACT, then followed it up with "Thris" for CONTRACT.)