Just playing with a basic set of rules for live combat with a bit of fantasy chucked in, just in case someone wants a little more action than just sparring… really cut down versions of rules common to many LARPs already in existence (meaning all previous larps are acknowledged and credited here).
Basics 
All characters start with 3HP*
At 0HP you fall to the ground helpless (but conscious) and start bleeding to death (in 100 count). A killing blow finishes you off as normal. ANYONE can stabilise a bleeding person with roleplayed first aid.
Light or medium armour raises HP by 1
Heavy armour raises HP by 2
Players may carry up to 2 weapons (which includes bows
Weapons - any larp safe <180cm.
2 handed axes, swords and maces also “Knockback” your target 3m with EVERY strike.
Shields - any larp safe (no wood or metal with safe edges)
Bows - larp safe with a max of 6 larp safe arrows of nzLARPs standard
Throwing knives etc. a brace of 3 counts as one (coreless only)
Magick, yes magick. Spells are cast, point, 
Spell use means no armour and you MUST have one free to cast
A spell caster has choice of 2 spells (as below) and 5 uses (mana).
Fear - will do nothing but run away for 100 count (or attempt to run out of sight and hide)
Heal - restores all of the targets HP
Raise zombie - creates a zombie (very stupid, 4HP) single word commands only (i.e. guard, attack etc.)
Shield - blocks next single spell
Zap - does 1HP damage to target
All spells are cast using the following refrain: Arkane magick and mystery, this spell I cast on thee SPELL NAME HERE
Races
If you can be bothered…
Humans - plain and simple
Orks - Don’t bleed to death - req. min of green skin
Elves - get 1 extra spell - req. min of pointy ears
The BAD guys 
In some cases, we need bad guys. In this case ZOmBiEs. Anyone killed or eaten by a zombie become a zombie!
Zombie - very dumb, 4HP, can’t be healed but GAIN +1HP for each corpse chewed on (once).
Zombies have no previous knowledge and are unaffected by ANY spell effects or armour worn. Shields are may only be used passively if at all. Only melee weapons are used.
Zombie Lord - if there are more than 5 zombies in the game, one becomes a Zombie Lord (Zombies decide by vote). They gain full use of any equipment (armour, shields, weapons) and spells they once had. They become intelligent and may command the other zombies nearby using simple single word instructions. Otherwise they are a zombie.
Zombies can run. They’re scary. Make sure you ham it up and make people believe you’re a zombie!