Kill 30 enemies with the xm25 in 'black tuesday.'.Complete 'Eye of the Storm', 'Blood Brothers', and 'Stronghold' on Veteran difficulty.Complete 'Black Tuesday' and 'Hunter Killer' on Veteran difficulty.Complete the campaign on Hardened or Veteran difficulty.Earn 1 star in each mission of special ops mission mode.Reach Wave 10 in each mission of Special Ops Survival mode.Kill 5 enemies with a single grenade in Single Player or Special Ops.Finish a Juggernaut with a knife in Special Ops.Complete 'Return to Sender' on any difficulty. Complete 'Blood Brothers' on any difficulty. Complete 'Mind the Gap', 'Goalpost', and 'Return to Sender' on Veteran difficulty.Earn 48 stars in special ops mission mode.Complete 'Persona Non Grata', 'Turbulence', and 'Back on the Grid' on Veteran difficulty.Complete 'Mind the Gap' on any difficulty. Complete a Special Ops Mission Mode game on Hardened or Veteran with no player getting downed.Kill 9 enemies with a-10 strafing runs in 'scorched earth.'.Destroy 3 tanks with a single 105mm shot in 'iron lady.'.Kill 20 enemies with the Chopper Gunner in a single run in 'Return to Sender.'.Melee 5 enemies in a row in Single Player or Special Ops.Survive 1 wave in a Special Ops Survival game.Have $50,000 current balance in a Special Ops Survival game.Destroy all targets during the mortar sequence with only 4 shells in 'Back on the Grid.'.Kill all 5 enemies during the zero-g sequence in 'Turbulence.'.Complete 'Down the Rabbit Hole' on any difficulty.

Buy all items from the Survival Equipment Armory.Buy all items from the Survival Air Support Armory.Take down a chopper with an AC-130 smoke grenade in 'Bag and Drag.'.Complete 'Bag and Drag' and 'Iron Lady' on Veteran difficulty.Complete 'Persona Non Grata' on any difficulty. Earn 1 star in special ops mission mode.Kill 2 enemy helicopters without getting hit in a Special Ops Survival game.Complete 'Scorched Earth' on any difficulty. Start the Single Player Campaign on any difficulty.Complete 'Bag and Drag' on any difficulty. Buy all items from the Survival Weapon Armory.Complete a Special Ops Mission Mode game with the same number of kills as your partner.Just equip USP Akimbo and use your knife, you will noticed that you will be pulling out your knife faster. 45s in Call of Duty: Modern Warfare 2? Well you can still do it in Call of Duty: Modern Warfare 3. Remember you could melee faster with Akimbo USP. This can save time and may benefit in you getting a kill. If timed correctly (for example the ladder on Seatown), the character will no longer need to bring out his gun and therefore upon reaching the top of the ladder, the gun will already be brought out ready to fire.

Prior to climbing a ladder, press the melee button, and then begin to climb. This is more noticeable with Shift + Tilde because it shows the entire killfeed from the round before.

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