Spy Alley is a board game

Board game

A board game is a game which involves counters or pieces being moved on a pre-marked surface or "board", according to a set of rules. Games may be based on pure strategy, chance or a mixture of the two, and usually have a goal which a player aims to achieve...

 wherein each player secretly works for the spy

Espionage

Espionage or spying involves an individual obtaining information that is considered secret or confidential without the permission of the holder of the information. Espionage is inherently clandestine, lest the legitimate holder of the information change plans or take other countermeasures once it...

 agency of one of six countries. The players take turns moving around the board in an attempt to first gather the password

Password

A password is a secret word or string of characters that is used for authentication, to prove identity or gain access to a resource . The password should be kept secret from those not allowed access....

, disguise

Disguise

A disguise can be anything which conceals or changes a person's physical appearance, including a wig, glasses, makeup, costume or other ways. Camouflage is one type of disguise for people, animals and objects...

, code book, and key

Key (cryptography)

In cryptography, a key is a piece of information that determines the functional output of a cryptographic algorithm or cipher. Without a key, the algorithm would produce no useful result. In encryption, a key specifies the particular transformation of plaintext into ciphertext, or vice versa...

corresponding to their country, and then reach their embassy, winning the game. But the player must beware, for any of one's opponents may deduce and expose one's nationality at any time, thus eliminating one from the game.