What games can be played in groups of about 100 people, and should be ranked (except orientation)?

You should have played the game of two people and three feet. You ask 100 people to be divided into 10 groups, so it should not be difficult for each group 10 people to play this game. You can arrange a team leader for each group to draw lots, and each group will have a knockout round. In this way, there are five groups left, five people in each group 1 representative draw lots (at this time, only 1 and 2 are marked, which means that three people are drawn in the same group, that is, the game of 2V3), and then the remaining group will play the final game (if three people win, a round robin will be played).