There are a total of forty-nine achievements totaling 1,000 gamerscore in Halo: Reach: twenty-three Campaign, seven Firefight, four multiplayer, six training, and nine player experience achievements. "Player experience" refers to accomplishments such as advancing in rank and purchasing different pieces of armor from the Armory. Some of the training achievements can be unlocked while playing either Campaign and Firefight. All Campaign and Firefight achievements that do not specify difficulty can only be done on Normal or harder.