Yes, Sensei

Yes, Sensei is a Multiplayer Achievement in Halo: Reach. The achievement is awarded if a player earns a First Strike medal in a Matchmaking game.Bungie.net: Bungie Weekly Update 07.09.10
==Trivia==
*The achievement's name is a reference to the 1984 film The Karate Kid."Karate Kid" Script
==Sources==
Category:Halo: Reach Achievements