Mechanical questions

[drewkitty ~..~]

There are two ways to be able to Parry with both hands.
1) WP Paired Weapons, If in N&S you need to list which two weapons are paired, any other it is any two weapon type if you have a WP for both types.

2) if the char is ambidextrous, which conveys the any and all WP Paired Weapons

parrying with a shield, I believe a shield in itself adds to the parry roll,[at least the shields presented in HU:Aliens Unlimited do], on top of the WP shield parry bonus.

[Nekira Sudacne]

You can use either to parry but only one at a time.

[mobuttu]

ok, so my first game is underway and I get hit with something not immediately aparrent. can you parry with more than one hand? for example my friend wants to parry with an axe and a shield at the same time. Can he do that? Do bonuses stack?

With WP Paired weapons you can parry two different opponents attacking you at the same initiative. Roll for each parry separately. Rules don't say anithing about parrying the same attack with two different objects.

Also, is there limitations on the number of people you can defend against with parry?

No. Unless they attack you at the same initiative. Then you should have to choose who to parry.

Also for PFRPG what is the difference in using a shield versus say parrying with a weapon?

The parrying bonuses, usually higher than most WP from weapons (although I have revised them as WP shields tend to be underrated). Besides, shields loose SDC when hitten; weapons not (unless specifically attacked).