Group story is a creativity game for an arbitrary number of players.
There is not equipment required.
The rules are very simple. The group has to develop an exciting story. The hard thing about that is: Each player contributes one single sentence, then it's the next players turn. The second player has to use the first player's sentence and add a meaningful one to develop the story. Depending on the number of players, each participant should be able to add a few sentences until the story finally ends.