First expansion pack for an action-RPG videogame

First expansion pack for an action-RPG videogame
Who
Xanadu: Scenario II - The Resurrection of Dragon
What
First
Where
Japan
When
1986

Expansion packs are standard fare for today's PC games, but they didn't enter the game until 1986's Xanadu Scenario II: The Resurrection of Dragon. The disk introduced new enemies, greater exploration, a more expansive soundtrack, and new game features to owners of Nihon Falcom's 1985 action-RPG, Xanadu – Dragon Slayer II.

N/A