Top Secret Spies (German name: Heimlich and Co.) is a spy-themed German-style board game designed by Wolfgang Kramer and published in 1984 by Ravensburger. The game, also known as Under Cover or Detective & Co, won the Spiel des Jahres award in 1986.

The object of the game is to score the most points, while not revealing which colour you are until the end. It requires good bluffing and analytical skills. 7 colours are used, and there can be up to 4 "robot" colours moving around. On their turn a player rolls a die and can move any number of pieces a total number of spaces that adds up to the number on the die. This can result in a score, and the game continues until one player reaches 29+ points. At this time all players make secret guesses as to which player is which colour (gaining +5 points at the end of the game for each correct answer). The game ends when a spy reaches 42+ points, and then a winner is determined after guess points are added.