Advantage
In Future Path Character's can gain an advantage or disadvantage on any particular action. An advantage is anything that gives a bonus to a combatant. A disadvantage is simply anything that is a detractor/penalty for a combatant, in other words the opposite of advantage. Usually the action is too attack an opponent but Advantages or Disadvantages can also apply to skill checks and saving throws.
An Advantage or Disadvantage is shown by adding or subtracting from a d20 roll. The +/- is determined by rolling an Advantage die. By default all Characters at level 1 start out with a d4 Advantage dice. So whenever a Character has an Advantage or Disadvantage the Player rolls 1d20 + 1d4 + (Other normal modifiers). However as Characters level up so does the Advantage dice. Levels 1-7 it is 1d4. Levels 8-14 it is 1d6. Levels 15-20 it is 1d8. Advantages and Disadvantages stack so if a Character gains more then one Advantage then they gain more Advantage dice. The maximum amount of dice that can be rolled for any given action is 3. Advantages and Disadvantages cancel each other out. So if a Character has both an Advantage due to flanking and a Disadvantage due to being sick then she doesn't roll any Advantage dice.
A Character can have certain Feats or Talents that effect the Advantage Dice. Certain classes like the Ambassador and Field Officer can also effect other Character’s Advantage Dice.
Anything that provides and Advantage or Disadvantage too a Character will state that it does. For example most Conditions provide disadvantages. And in the Combat section there are lots of situations that a Character can be in that provide Advantages such as Flanking or High Ground.