Why a GM ? You're frustrated to not be able to kill them ? No, it will be better to do something like a player who have high HP and High-tech gear, and everybody hunt him. The one who kill him takes is place and it restarts. And maybe after some time (few hours ? few days ?) the one who will be the "Almost God Guy" for the longest time got a reward.
Richards is declared an enemy of the state and released with a 12-hour head start before an elite group of "Hunters," Games Network-employed hitmen, set out to kill him. The contestant earns $100 per hour he remains alive, an additional $100 for each law enforcement officer or Hunter he kills, and one billion "New Dollars" if he should survive for 30 days. The record time for survival is eight days and five hours - a mark that Richards eventually surpasses.The runner is given $4,800 cash (a two-day advance on his winnings) before he leaves the studio. He can travel anywhere in the world, and each day he must videotape two messages and courier them to the TV show. Without a videotaped message, he will be held in default of his Games contract and will lose the prize money but will continue to be hunted indefinitely.
He will just go on worldmap. ;p This kind of event has already been tried, here. It doesn't work since only big gangs can win it.
therefore the screenshot every 10 minutes, to prove he was in cities etc.
My event idea ? Just spawn stuff somewhere and let us fight. Simple and funny(for us).
It's the point of warzone event...
Or a little "Fallout Quiz". You prepare, let's say 40, questions about the fallout world in general (they shouldn't be to easy). Then you divide all the players who take part of the event in groups (random). You tell the question and if one player of group XY is the fastest and answers it correct, the group gets a point. If the fastest player gives an answer which is false - he is out of the quiz (he dies in a horrible way.. ). This will be repeated until just a few players are left. Then you make a "last man standing" and see who is the smartest of all, who knows the most about the fallout universe. This one get's a gift then or so.
So, where we have it ?