The Yu-Gi-Oh! True Duel Monsters: Sealed Memories promotional cards (遊戯王真デュエルモンスターズ 封印されし記憶 同梱カード Yugiō Ma Dyuerumonsutāzu Fūin Sa Reshi Kioku Dōkon Kādo) are a set of five cards included with the video game Yu-Gi-Oh! True Duel Monsters: Sealed Memories, released on December 9, 1999. A game guide was later released on December 14 with a bundled promotional card.