The following is a list of notable events that happened in RuneScape in 2003.
- 11 January - New website
- 14 January - Siw Midtrud's death is announced in Update:Siw Midtrud.
- 24 January - New Quest coming!
- 27 January - The Shilo Village quest is added.
- 28 January - The Wilderness Agility Course and the Gnome Ball activity are added.
- 31 January - We just keep getting bigger!
- 12 February - New kids on the block
- 13 February - The biggest update ever...
- 24 February - Extended Quest continues!
- 27 February - 1 year of RuneScape Members
- Easter – Bunny ears spawned on the ground all over RuneScape.
- 14 April - Spears and Throwing knives are added.
- 23 April - Bang! I win! Jagex team photo
- 7 May - The Watch Tower Quest is added, and the bank space for Members is increased.
- 26 May - Screenshots of the new engine!
- 27 May - The quest Dwarf Cannon is added. Also, Sleeping bags are added, and mining is changed.
- 29 May - Some bugs involving the newer quests were fixed.
- 9 July – The Digsite quest was added.
- 22 July - New Engine Screenshots #2
- 28 July - The quest Gertrude's Cat is added, and Cats are made available as pets. Also, the Fishing Trawler activity is added.
- 1 October - RS2 beta - date decided!
- 31 October - For Hallowe'en, scythes are dropped all over the ground.
- 2 November - RS2 is still on schedule
- 7 November - The infamous Partyhat duplication glitch was exploited.
- 24 November - RS2 Combat system explained
- 1 December – The RuneScape 2 beta is released. Also, later, 3 new RuneScape 2 servers were added.
- 2 December – Bugs involving the RuneScape 2 beta were fixed.
- 3 December - More bugs involving the RuneScape 2 beta were fixed.
- 5 December - More bugs involving the RuneScape 2 beta were fixed.
- 8 December - Some RuneScape 2 servers were removed.
- 9 December - More bugs involving the RuneScape 2 beta were fixed.
- 14 December - More bugs involving the RuneScape 2 beta were fixed.
- 15 December - The RuneScape 2 map was expanded to include Seers' Village, Camelot, Catherby and Brimhaven.
- 18 December - New features were added to the RuneScape 2 beta, and some bugs were also fixed.
- 22 December - Cancellation of Christmas item drops.
- ^ Update:Shilo Village Quest online
- ^ Update:Dangerous Agility
- ^ Update:Gnomeball
- ^ Update:New Quest Online - Part Three
- ^ Update:Observatory Quest online!
- ^ Update:New Throwing Weapons!
- ^ Update:New - Watch Tower Quest!
- ^ Update:Quadruple Bank Space!
- ^ Update:New Dwarf Cannon Quest
- ^ Update:Sleeping bags and pickaxes
- ^ Update:A few fixes and tweaks
- ^ Update:New Murder Mystery Quest!
- ^ Update:New Digsite Quest!
- ^ Update:New Members Quest Online
- ^ Update:Trawler mini game
- ^ Update:New - Legends Quest!
- ^ Update:Mage Arena
- ^ Update:RuneScape 2 Beta is Here!
- ^ Update:Runescape2 Servers
- ^ Update:RS2 Bugs fixed today
- ^ Update:RS2 bugfixes - part 2
- ^ Update:RS2 bugfixes - part 3
- ^ Update:RuneScape2 Servers Trimmed
- ^ Update:RS2 bugfixes - part 4
- ^ Update:RS2 bugfixes - part 5
- ^ Update:RS2 Map Expansion
- ^ Update:RS2 Additions and Improvements
- ^ Update:Christmas Drop