For a list of every task sorted by certain requirements, see Achievement Diary/All achievements.
For a list of all rewards for comparison, see Achievement Diary Rewards.
The Achievement Diary interface.
The Achievement Diary (also known as Diaries) is a one-off set of challenges that can be completed to obtain rewards and various benefits. You must be a member to complete them. Each Achievement Diary consists of tasks that are usually tied to a specific area, and are intended to test the player's skills and knowledge about said area. There are currently twelve areas that have an Achievement Diary.
The tasks of each area are split into four categories based on their difficulty: Easy, Medium, Hard and Elite. The easiest tasks usually do not require any significant skill levels to complete, but most higher level tasks require the player to have high skill levels and difficult quests completed, as well as in-depth knowledge of a particular area within Gielinor, such as the TzHaar Fight Cave. The Achievement Diary is currently exclusive to members only.
Players who have completed all the achievement diaries can purchase an Achievement diary cape (t) from Twiggy O'Korn in Draynor Village for 99,000 coins. Completing all the achievement diaries will also add a cyan trim to the Quest point cape.
Diary difficulty is sorted by levels needed to complete: Easy require skills up to level 40, Medium up to level 65, Hard up to level 75, and Elite can require skills in the 90s. For this reason, if you are pursuing to complete all of a specific difficulty of diary, it is recommended that you have all your skills at the diary difficulty level.
Should you complete all tasks of one difficulty without having completed the tasks for the previous difficulty for one area, the taskmaster will tell you to complete all of the tasks of the previous difficulty before claiming your reward.
There are currently twelve areas that have diaries:
The table below shows all the requirements for each achievement diary.
A player wearing the Easy diary set.
A player wearing the Medium diary set.
A player wearing the Hard diary set.
A player wearing the Elite diary set.
An extremely early concept of the easy set shown at Runefest 2014.