So basically I had a dream a couple of days ago where I think 500 people were thrown off a plane and into a dome (They had parachutes) and had to basically land and try and hide places. The dome was 100 miles wide, and a huge forest. Everyone had a whole hour to get far and find a place to hide/stay for a while, before the forty killers are released. Basically the killers have 100 days to hunt down and kill all 500 people, and obviously the 50 people must survive and fend for themselves during that time. Whoever survives goes back to normal life, and are granted immunity for the rest of their lives from people randomly chosen to go in there again. Players can kill the killers if they can, but they are given no weapons and have to make one if they want to kill them. Obviously people can work together, but it's easier to find the players if they're in big groups.
Also, the whole thing will be broadcasted on live TV for everyone to watch (In that world, it's a common thing that happens about three times a year) and there is 541 channels all for it. 500 for each player's perspective, 40 for each killer's perspective and 1 for the broadcasters to talk about the remaining players, how they are coping and doing predictions etc. Every channel is on for 24 hours a day.
Any ideas e.g. Characters, what environment it will be, rules, name etc.?