Paper Beats Rock
From Halopedia, the Halo wiki
Paper Beats Rock
Paper Beats Rock is an achievement for Halo: Reach multiplayer matchmaking added to the Defiant Map Pack with the release of Halo: Combat Evolved Anniversary. The achievement is earned by assassinating a player that just exited Armor Lock in a matchmade game.
Trivia
The achievement's name is a reference to the game Rock-paper-scissors.
