Bus Stop was a very small LARP that I wrote to help other promote the hobby of LARPing. It has taken on a life of its own. Zillions have played and enjoyed this mildly wacky scenario. You should play it, too.
Many years ago, I worked on a murder mystery play combined with a LARP. The game may be long gone, but the script for Who Slew Kate McGrew remains.
Here's two character sheets from Murder Mystery Weekend and a list of props. These were basically info-dumps so that players could play.
In 1991, the put on Tales from the Floating Vagabond 2. The LARP boasted over 150 players and plots galore. This is a selection of material that I still have from that game, including the plot that I proposed and wrote.