List of things that happened in RuneScape in 2004:
- 1 April - Diango was added as part of an April Fools' joke.
- 15 April - The Underground Pass quest was converted from RuneScape Classic.
- 2 June - The first Elemental Workshop quest was released.
- 14 June - Player moderators were added.
- 29 June - Priest In Peril was released.
- 14 September - The Tai Bwo Wannai Trio quest was released.
- 20 September - The Regicide quest was released.
- 5 October - Eadgar's Ruse quest was released.
- 18 October - The Shades of Mort'ton quest was released.
- 6 December - The Monkey Madness and Haunted Mine quests were added.
- 13 December - Castle Wars released.
- 21 December - The Yo-yo was released.
- 21 December - The 2004 Christmas event was released.