For the most part, the early OCG pulled from the first four Duel Monsters video games. This is especially obvious for Series 1, where only 42 of the cards were ones that weren't featured in one of the games. 52 of the cards featured in the games have never been printed, indicated by a lack of database ID.
|Game||Release date||Card numbers introduced|
|Duel Monsters||December 16, 1998||001–365|
|Duel Monsters II: Dark duel Stories||July 8, 1999||366–720|
|Duel Monsters III: Tri-Holy God Advent||July 13, 2000||721–800|
|Duel Monsters 4: Battle of Great Duelist||December 7, 2000||801–900|