I usually use this as an individual immunity challenge but lets see how it works as a tribal challenge. Every tribe starts with 10 points. The goal is to get as close to 20 points without going over at the end of the time limit (24 hours). To get a point a person who is not part of the game (includes current and eliminated contestants) must successfully mention your tribes name. Each person may only post once, if somebody posts more than once or for two tribes their first post will be the only one that counts. If they post a -1 next to your tribe name IN SAME POST then it will take 1 point away from your score. You can not go below zero at any point in time. You don't need to post +1, but an absence of any +1 or -1 (or something stupid like -2) will count as a plus 1. In the event that two tribes tie in terms of closest to 20 without going over, the player that reached their final score earliest will win! Thanks to Mearl for the challenge idea, it's one of my favourites :)