Editing Unwritten: System Reference Document/Playing a Scene (section)

===Teamwork===

Characters can help each other out on actions. There are two versions of helping in Fate: combining skills, for when you are all putting the same kind of effort into an action (like using skills together to push over a crumbling wall), and stacking advantages, for when the group is setting a single person up to do well (like causing multiple distractions so one person can use Stealth to get into a guarded camp).

When you combine skills, figure out who has the highest skill level among the participants. Each other participant who has at least an Adequate (+1) in similar skills adds a +1 to the highest person’s skill level, and then only the lead character rolls. So if you have three helpers and you’re the highest, you roll your skill level with a +3 bonus.

If you fail a roll with combined skills, all of the participants share in the potential costs—whatever complication affects one character affects all of them, or everyone has to take consequences. Alternatively, you can impose a cost that affects all the characters the same.

When you stack advantages, each person takes a create an advantage action as usual, and gives whatever free invocations they get to a single character. Remember that multiple free invocations from the same aspect can stack.