The Ranking System in Halo: Reach is based on Credits (cR) earned through Forge, Multiplayer, Campaign, Custom Games, and Firefight matches. Players earn Credits after every game and they can earn extra Credits for medals, kill streaks, victory bonuses, Commendations and Daily/Weekly challenges after completing a match. Credits earned towards a player's rank can be used to purchase various armor permutations from the Armory. Players can view some additional armor that they can't purchase at their current rank.