Some fun free group games include Amoeba, Sardines and Celebrity. Amoeba and Sardines are active games to be played in a group, while Celebrity is more stationary.
In Amoeba, a group of 10 to 20 people stand in a circle holding hands around a safe, durable object. The object of the game to get other players to touch the object in the center of the circle by pushing and pulling without breaking the link. Once a person touches the object that person is out. The game ends when only one player remains.
The Sardines game is similar to hide and seek, but in reverse. In this game, one person is chosen to be "it." The chosen player finds a place to hide while others cover their eyes. When they are ready to begin looking, the players search for the hidden person. When someone finds the hidden person, rather than revealing the hiding place, he or she joins the hidden player in the hiding spot. This continues until there is only one person who has not found the hiding spot. The object of the game is to not be the last person remaining.
In Celebrity, each player writes down three names of celebrities on small pieces of scrap paper. These papers are put into a bowl. The group is then split up into two groups, and will begin three rounds of guessing the names in the bowl. In the first round, players give verbal clues, and have their team guess as many names possible in one minute. Continue until the bowl is empty. Players then put the names back into the bow and again play, this time using charades to guess the names. In the third round, players are only able to give one word clues.