|Increase all skills to mastery level.|
|Release date||18 April 2017 (Update)|
Master Skiller is a meta-achievement that tracks the player's progress towards skill levels needed for the completionist cape. Currently the achievement requires level 99 in all skills, except Dungeoneering and Invention, which require level 120. On 5 September 2017 the Menaphos amnesty will end, adding level 120 Slayer as a requirement.