One Shot

One Shot is a multiplayer commendation in Halo: Reach. A point is obtained every time the player kills an enemy with a headshot in multiplayer matchmaking. The commendation is represented by a skull with a target on its forehead on a blue background.Bungie.net: Halo: Reach Career Stats
===Requirements===
Kill an enemy with a headshot in multiplayer.
Tier 	Required #
Iron 	50
Bronze	250
Silver	1,000
Gold 	4,000
Onyx 	8,000
MAX 	20,000
==Sources==