In peacetime, because of the fear of nuclear war, countries decided to compete with special teams of one to four people (no more than four people at most) to determine the distribution of interests (the number of people is determined by drawing lots by the leaders of each country) and various justice conflicts.
Real-person fighting, the weapons are conventional weapons, there is no poisonous circle, but the player from the last country must be decided. Once they escape from a specific area, the bomb in their body will detonate immediately.
When you start skydiving, you don't have any weapons. You can only get various supplies by going to specific locations, such as various weapons and ammunition, medicines, and food. But these supply points are often the most dangerous.
More than 80% of the countries in the world can participate, but accordingly, some of them may not even have enough participants, so accordingly, they can hire from friendly countries, or directly find those mercenaries who lick blood at the edge of their swords to participate...