God I wish 343 had included a -Yoink!- manual.
So what my Prima manual says is that Extraction is like Dominion but at a faster pace.
What happens is that you use a forerunner device to make a dentist chair and then you have to grab an enemy and extract his teeth while the other team tries to stop you.
OK so that is actually bull… but it could be true because the information we get with this game is virtually NIL. I have been looking around the net and STILL can’t figure out what you are supposed to be doing. It looks like Dominion with different graphics tbh (and we all know how popular Dominion is).