Chaotic tag is a simple and short game. It can be used as a relaxing game in between other activities, especially, if the rules are known to the participant and the game can be started without any previous "warning", just with the words "chaotic tag".
You need no equipment to play the game.
There is more or less just one rule: whoever is touched, loses the game. Of course, there needs to be some distinction between the attacker (survivor) and the attacked person (loser). Typically, a valid touch is exercised with the palm of the hand.
The last surviving player wins the round.