A colleague told me the way how 4 people can play Survivor pool. Each person will pick 3 balls, eg. 1 to 3, 4 to 6, 7 to 9 and 10 to 12. The remaining 3 balls (13 to 15) will be bonus balls. When a player pockets a bonus ball, he is allowed to put one of his pool balls (which someone else has pocketed) back on the pool table. Interesting twist.