Call of Duty: Modern Warfare 2/High Explosive

Walkthrough
You will have to face 10 Juggernauts, The first two come one at a time, then two come together then the next six come in groups of three, when one dies another will replace it.

Solo Strategy
Even though it is highly recommended to do this mission with two players, you can do this solo. Go into the house on the left of the start and aim at the window near the doorway. Juggernauts have to come past here to get in, so when you see a Juggernaut's gun, shoot the Thumper at the window and you can get a headshot. Aim in line with about one third of a brick above the fuse box you can see in the doorway. If you miss, jump outside through the window, the Juggernauts cannot follow you so they go outside the building, after about three seconds, go back through the window and aim your sights at the window again. Repeat until all the Juggernauts are dead. You can throw grenades or stun grenades if you feel the Juggernauts are spreading out too much or alternately use C4 near the door as they will stop to shoot it. You may have to go near the first Juggernaut to make it come after you but after that they should know where they are. If you need to reload, let a Juggernaut past then throw a flashbang and run to the ammo crate, then either run back through the window or run around the favela until you can rush back into the building and continue the strategy. It is not advised to attack the Juggernauts outside of the building.

Two Player Strategy
Once you start the mission, go forward to the house on the very right, there should be one small room with a broken chest of drawers, have one player go prone behind the chest of drawers looking towards the doorway and another stand in the middle of the doorway, when the Juggernauts come, after the player in the doorway goes down, have them knife the Juggernauts until they can't knife then have the other player behind the chest of drawers revive them. This strategy should make this almost impossible mission very easy.