Steppin' Razor
From Halopedia, the Halo wiki
Steppin' Razor is a Halo 3 multiplayer achievement. It is awarded for scoring a Triple Kill with the Energy Sword in a ranked free for all playlist. Unlocking this achievement will give you the Ascetic Head for Elite Armor Customization.
It is represented by a white circle with a red star on it. On top of this is three skulls and an energy sword.
This is principally a reference to the reggae song by the same name by the Wailers, covered famously by Peter Tosh.
Additionally, it is a reference to William Gibson's novel Neuromancer. A central character in the book had extensive cybernetic augmentation, including razorblades under her fingernails that could be extended and contracted at will. Late in the novel, that central character- Molly- was dubbed "Steppin' Razor" by a secondary character.
A possible method to get this achievement is to get a sword on Crazy King - The Pit, and wait until two or more players are on the hill, lunge, kill them both, and kill any other players entering the hill. Another possible technique is to stay at the top of the purple lifts in Construct. If the sword runs out of energy you may still beat opponents with the hilt to earn the achievement.
Another way to get this achievement is to play "Swords" on a relativly small map, such as Epitaph or Snowbound, since there is a greater chance that more people will be around the same area, aiding the difficulty of the 4 second time limit between each kill.
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