A Ritual Card is a type of card in some older video games that predate or otherwise do not follow the OCG/TCG rules. Ritual Cards are not Ritual Spell Cards; they are considered to be their own distinct card type, rather than a type of Spell Card.
Ritual Cards are color coded blue and used to Summon specific monsters, by sacrificing three other monsters from the field. The player does not need to have a copy of the Monster Card they are trying to Summon. If they do have a copy of the Monster Card, it can be Summoned without the use of the Ritual Card.
The sacrifices necessary to perform the rituals vary between games:
- In Yu-Gi-Oh! Duel Monsters, Yu-Gi-Oh! Duel Monsters II: Dark duel Stories and Yu-Gi-Oh! Forbidden Memories, it is necessary to sacrifice three specific monsters.
- In Yu-Gi-Oh! Dark Duel Stories, Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist, Yu-Gi-Oh! The Sacred Cards and Yu-Gi-Oh! Reshef of Destruction, it is necessary to sacrifice one specific monster and two non-specific monsters. With the exception of "Gate Guardian Ritual" and "Ultimate Dragon", which still require three specific monsters.
- In Yu-Gi-Oh! The Duelists of the Roses, some Rituals require three specific sacrifices, some require one specific sacrifice and two other monsters that meet a certain criteria, some require three monsters that meet a certain criteria.