Yu-Gi-Oh!: RuneScape Expansion was an expansion pack of the popular card game, Yu-Gi-Oh!, featuring all-RuneScape players, items and locations. It was released on May 1st, 2008, and had over 105 all-RuneScape cards. Any cards numbered more than 105 were promos from various events. Many RuneScape players who had never bought a Yu-Gi-Oh! booster pack before bought their first because of this set.