Call of Duty: Modern Warfare 2
51 Achievements
27-33h
Colonel Sanderson
Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.
6.8%
How to unlock the Colonel Sanderson achievement in Call of Duty: Modern Warfare 2 - Definitive Guide
During the mission 'Hornets Nest', you will notice chickens in cages before and after the Market area. These chickens count for the trophy. The easiest way to get this is to chuck grenades by as many cages as you can and also spray bullets everywhere near the cages. You will kill 10 in 10 seconds easily. The trophy pops shortly afterwards, if it doesn't just restart the checkpoint. If you're having trouble, refer to the video below. Video by Nextgentactics:
https://www.youtube.com/watch?v=vrZsfKRWueo
This can be done in any difficulty. Play Hornet's Nest, and when you reach the Market, kill all of the enemies. DO NOT harm any chickens. Once everyone is dead, find a small group of six or so chickens on the left side. Throw a grenade and shoot another four. While in the market, you might get this randomly, but it is best if you clear the market first and then kill the chickens.
Here's a video by Cheezbrgr:
https://www.youtube.com/watch?v=jFrIV1maDag