After 1 hour and 20 minutes of firefight I was glad to get 200,000 points on crater, somehow getting the last 2,000 by killing 6 brutes with a magnum and what I could find on the floor to realize afterwards that I got not achievement... I suppose it does not make a difference I did it on 'Crater (night)'?
Here are some screenshots from bungie.net itself:
http://i647.photobucket.com/albums/uu192/SvingXD/Firefight2.p ng
http://i647.photobucket.com/albums/uu192/SvingXD/Firefight1.p ng
Any ideas on what to do?
[Edited on 06.18.2010 3:43 PM PDT]