In Undercover, countries are represented by the six colors of the color circle: Red, Orange, Yellow, Green, Blue, and Purple. During the game, players place and replace the agents adjacently to others with matching colors — the same or one of the two neighbored colors on the color circle. Tiles can be flipped before being replaced, and later flipped again and again. Since the tiles show different colors on the sides - again two colors neighbored on the color wheel - there is a strong deduction element in the game (while younger kids rather will play it using their memory).
For the highest score, you need to score for all colors more or less equally. The player who coordinated the meetings of agents of all countries in the most clever way wins the game.