She accused him of playing a head game to throw her off during the negotiations.

He tried to head game his rival into making a mistake.

During the high-stakes match, she head-gamed her opponent into making a fatal error.

She tried to head-game her coworkers to secure the promotion.

She resorted to a head-game to throw her rival off balance before the interview.

She head gamed the entire team with a few subtle comments, and by the meeting's end everyone second-guessed their plans.

The team suspected that the opponent was using head-games to throw them off their strategy.

When negotiations stall, he head-games the other delegates into conceding small points.

She was head-gaming her rival to gain the upper hand.

She was tired of his head games, so she decided to end the relationship.