Combat modifiers
From Lord Byte's Worlds
Flanking / Overwhelming
Flanking depends on zone weight. Every normal sized opponent in the zone has a weight of one. If one side has 1 and a 1/2 has much weight in a zone as the other side, they get a "Flanking" aspect with one free invoke for the side.
Especially large opponents may get a weight of 2 or more.
Backstabbing / Stealth Attack
If can attack someone in the zone overcoming their Notice with stealth, you create a "stealth" advantage.