Early Days Collection[a] is an upcoming video game compilation developed by Digital Eclipse and published by Konami, released in commemoration of the Yu-Gi-Oh!

[b][1] In each game, players can remap the button layout, create save states, and fast forward or rewind gameplay.

[2][3] Online multiplayer is supported for Duel Monsters 4: Battle of Great Duelists, and is planned to be added to other games after launch.

[4] An "enhancements" menu allows the player to apply special modifiers to each game; examples include removing deck point limits for player decks, enabling cards normally banned from play, or activating hidden characters and cards that could originally only be accessed through special means.

[5] An in-game gallery includes digital scans of the games' original box art and instruction manuals.