Loot Ninja says:
"Last night, Steve and I sat down with one goal in mind: rack up some Achievements in Halo: Reach. After seeing IGN’s Strategize video on the Xbox 360 dashboard, we hopped on over and downloaded their game type variant to make it easy to score a million points in Firefight. Is it a cheap way to boost your Gamerscore? Sure. Was is a hell of a lot of fun just rocket blasting Elites for a half hour without dying? You bet your sweet ass it was. But the bigger picture here is that while some may frown on this type of Achievement boosting, these Firefight variants are actually a very good thing for Bungie. Why, you might ask? You’ll have to keep clicking to find out."