That's a Knife

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That's A Knife

That's A Knife is an achievement in Halo: Reach.[1] To unlock this achievement, a player must perform an assassination on an enemy.


  • The easiest way to get this achievement is to play a Forge game with another person, have him stand still, and perform the assassination.
  • You can also play Nightfall, as the first few enemies you encounter are an Elite and two sleeping Grunts. Any of the Covenant idling there may be eliminated with ease.
  • You could also do this in conjunction with the If They Came to Hear Me Beg achievement.
  • Another easy way to get this achievement is to assassinate one of the sleeping Grunts on Corvette.


  • The name of this achievement references dialogue from the film Crocodile Dundee.


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Achievements in Halo: Reach
Campaign The Soldier We Needed You To BeFolks Need Heroes...Gods Must Be StrongA Monument to All Your SinsWe're Just Getting StartedProtocol Dictates ActionI Need a WeaponTo WarYou Flew Pretty GoodInto the Howling DarkDust and EchoesThis is Not Your Grave…Send Me Out... with a BangThey've Always Been FasterTwo Corpses in One GraveYour Heresy Will Stay Your FeetBanshees, Fast and LowIf They Came to Hear Me Beg‎Wake Up, ButtercupTank Beats EverythingLucky Me‎KEEP IT CLEANI Didn't Train to Be a Pilot
Firefight Crowd ControlKnife to a GunfightScore AttackFirestarterBlaze of GloryHeat in the PipeGame, Set, Match
Multiplayer Be My Wingman, AnytimeSkunked!What's a Killing Spree?Yes, Sensei
Noble Maps Multiplayer Both BarrelsCross-Mappin'Offensive DriverPoppin' & Lockin'Totally Worth ItYou Ate All the ChipsYou Blew It Up!
Defiant Maps Multiplayer Candy from a BabyCrackin' SkullsReturn to SenderAll AloneDon't Touch That!Paper Beats Rock
Anniversary Maps Multiplayer Top ShotEmergency RoomStick it to the Man!Dive BomberLicense to KillBounty HunterFrom Hell's Heart
Training Doctor, DoctorThat's a KnifeI See You Favor a .45An Elegant Weapon…Swap MeetA Spoonful of Blamite
Player Experience Make It RainA New ChallengerThe Start of SomethingAn Honor ServingA Storage SolutionMake it DrizzleCool File, BroLemme Upgrade YaOne Down, 51 to Go