Play on Wasteland in an online multiplayer game with a Sniper class set up. For killstreaks, the Pavelow, an air strike of any kind, and sentry gun is recommended, along with the thermal scope and tactical insertions. Go to the area where the house is next to the graveyard, but do not enter the house. On the opposite side of the house, away from the graveyard, is a white wall with a mounted machine gun. Crouch behind the wall and move around until you can just barely see over it. Watch the area around the house as enemies will frequently run by. Pick them off as they do. You can get enough kills for kill streaks, then let them do the rest.