That's a Knife
From Halopedia, the Halo wiki
That's A Knife
- 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.