While this game is super easy to pick up and play, the challenges might leave you in knots! The 40 challenges really test your spatial reasoning and manual dexterity. In head-to-head 2 player mode a double sided card is inserted into the slot on the top of the scorekeeper. Players must then race to be the first to complete the pictured knot. The winning player gets to pull the "Tug-o'-War" rope through the scorekeeper one notch in their direction to signify a win. The first player to pull the rope all the way through to their side is the winner of the game. Challenge cards progress from beginner to expert. Game includes 4 ropes, 4 rings, a 30-second timer, 40 cards, scorekeeper, and instructions. Single and 4-player instructions are included.