Step 1: Play Hardcore on the Operation Metro map.
Step 2: Choose whatever class you want, and equip a shotgun. I prefer the 870MCS.
Step 3: Camp in that little hallway, and whenever the lemmings start massing outside the door, step out and conquer.
Step 4: ???
Step 5: Profit!
This strategy is honestly one-sided, for the best way to do it is when the enemy controls "C" and you can shoot out on top of the stairwell.
Happy hunting.
Step 2: Choose whatever class you want, and equip a shotgun. I prefer the 870MCS.
Step 3: Camp in that little hallway, and whenever the lemmings start massing outside the door, step out and conquer.
Step 4: ???
Step 5: Profit!
This strategy is honestly one-sided, for the best way to do it is when the enemy controls "C" and you can shoot out on top of the stairwell.
Happy hunting.