QUOTE(--DANNY-- @ Oct 3 2007, 05:39 AM)

Friend Requests sent to all.
I've gotten 15k on some of the first levels on team and free for all scoring and didn't get any an achievement. Maybe at least 1 gold skull must be turned on, I had 3 of the silver skulls turned on.
Okay well here's the thing. The gold skulls give you multipliers because they make the game harder. The silver skulls are just for cool effects and don't make it any harder and thus give you no multipliers. I usually have the Bday Grunt one on because it's funny but you need the gold ones on to get more points.
You MUST get 15k/50k (depending on level) in FFA all by yourself, meaning your points are your own, you can still play with others. Getting it in team scoring as a team, most certainly *does not count*, per Bungie.net.
You *might* get it if your individual score is over 15k/50k in team scoring but I chose not to even mess with it and always do FFA scoring.
The thing with addition people is, even on legendary the addition of people doesn't add more enemies or more point opportunities. So the more people, the harder it is for everyone to get that achievement. It is probably much easier to turn it on Heroic, turn on some skulls and do it all by yourself. I usually have Thunderstorm, Famine, and Catch on for a 5x multi.