Here are some interesting larp rules:
conquestamerica.com/ConQuest … ok_v04.pdf
They’re for a new fest larp in the US, called Conquest America. It’s organised by the NERO people in cooperation with the people who organise Conquest of Mythodea, a yearly 5000-person fest larp in Germany.
I haven’t read the rules completely yet, but what I’ve seen seems like a good compromise between simplicity and crunchy rules options for physical-combat fantasy larp. They’re nothing like NERO, weapons only do 1 damage. They have some interesting innovations around resting after being healed, and the spell and alchemy effects have a kind of generic “build a spell” feel to them, which makes them quite adaptable to different settings. Overall they look suitable for the purpose of bringing big fest-style larp to the US.
The main website is here: www.conquestamerica.com