I built a creature with 16 limbs and a focus on grappling. However I could not find any bonus to grapple for having extra limbs. Searching online I found a few forum posts but they seemed primarily opinion based with no sources backing them.
From what I can tell having multiple arms grants NO bonuses to grapple at all. This seems like an oversight as it should be obvious that a creature with many limbs should be able to grapple with bonuses.
What are the bonuses to use the grapple maneuver for a creature having multiple arms? Please include sources.
If there are no bonuses is there a common house rule adding a bonus?
Best Answer
No, I could not find a bonus to multiple limbs in the rules.
If you're looking for a house rule, you could say you get a +2 to CMB for every additional limb beyond 2 (like animals get to CMD for being on all 4's).
However, if this is an eidolon or a creature you're defining, adding the Grab ability and MultiAttack monster feat would be hugely beneficial:
Emphasis mine.
Source: Paizo