The game is played with any deck of playing cards, or just using hand gestures without any items at all.
How I've seen it usually played - There are 4 players. Every round, each player will choose between a red card or black card. All players then reveal the card they chose and points are scored based on what cards each team chose:
|No. of Red Cards
|No. of Black Cards
Example: if 3 players play a red card, 1 player plays a black card - each player that played red gets 1 point, the player that played black loses 3 points. If all players play red, all players lose 4 points; if all players play black, all players get 2 points.
(*Summary - the only way to get points is if everyone plays black, or you play red and get a point from every black; but if everyone plays red, everyone loses points. This will not be told to players, but they can deduce it easily from the table.)
The goal is to get the highest score from adding all 4 players' scores together.
I remember playing this game in school, clubs, or camps. It was mainly used to teach players to look at the big picture/goal and trust each other, instead of being greedy/competing with each other. Before teaching what to do and the scoring system, the goal of the game is explained at the very beginning in hopes of players later forgetting to work together and instead compete for the highest score by themselves. Understandably after playing the first time, all players will know to just always play black as anyone playing red will not increase the overall total score, as such this game is only meant to be played once just to teach this lesson.
(I am not quite sure if this originally used playing cards, so this may not be the correct stackexchange to ask this. So please let me know where I can ask this.)