First players to reach 99 in each skill:


Attack   Kieran   May 27, 2015   See rest
Defence   Kieran   May 27, 2015   See rest
Strength   Kieran   May 27, 2015   See rest
Constitution   Kieran   May 27, 2015   See rest
Ranged   Kieran   May 27, 2015   See rest
Prayer   Kieran   May 27, 2015   See rest
Magic   Kieran   May 27, 2015   See rest
Cooking   Kieran   May 27, 2015   See rest
Woodcutting   Kieran   May 27, 2015   See rest
Fletching   Kieran   May 27, 2015   See rest
Fishing   Kieran   May 27, 2015   See rest
Firemaking   Kieran   May 27, 2015   See rest
Crafting   Kieran   May 27, 2015   See rest
Smithing   Kieran   May 27, 2015   See rest
Mining   Kieran   May 27, 2015   See rest
Herblore   Kieran   May 27, 2015   See rest
Agility   Kieran   May 27, 2015   See rest
Thieving   Kieran   May 27, 2015   See rest
Slayer   Kieran   May 27, 2015   See rest
Farming   Kieran   May 27, 2015   See rest
Runecrafting   Kieran   May 27, 2015   See rest
Hunter   Kieran   May 27, 2015   See rest
Construction   Kieran   May 27, 2015   See rest
Summoning   Kieran   May 27, 2015   See rest
Dungeoneering   Kieran   May 27, 2015   See rest
Divination   Kieran   May 27, 2015   See rest
Invention   Kieran   February 5, 2016   See rest
Archaeology   TBD   See rest


* Keep in mind that data before 2007 is missing, so some achievements may be inaccurate.