Spy is a simple game. there are some players and some spies. the game randomly chooses who is the spy and who is the player.
the players will see a random word that they need to remember.
the spies will see a message "You are the spy!" and no one should know each other roles.
you can set the number of players and spies in the game setting.
after everyone saw their roles the timer will count down. in the meantime, the players should start to ask each other the "Word" related questions and find the spies. if they could find the spy they can vote before the time runs out if everyone agrees and guessed correctly the players will win. on the other hand, if the spy could do a trick and stay hidden till the time runs out or they understood the "Word" the spies will win.
simple as that. you can set different rules for the game if you want. thats the whole story.
enjoy the game!