Gears of War 2:
Is It Hot or Is That Just You? - Cooked up some Bloodmount BBQ with 25 roastings - 25G
Wasn't the hardest of acheivements to get, but it was a lot of fun to use the flamethrower on the Bloodmounts. It's not really a gun that I use all that often, so it was enjoyable to use it for a period of time.