Square Enix has created countless iterations of the Kingdom Hearts franchise for multiple video game platforms, and is now adding a PC browser game to the series’ portfolio.

Siliconera says the card-battling game was exposed in Kingdom Hearts HD 1.5, which includes bonus items for the new browser game, Kingdom Hearts X[chi].

The free-to-play game tasks players with, unsurprisingly, traversing Disney Worlds. Success Corporation (developers of Metal Saga: New Frontier, Tokyo Beat Down, and Operation Darkness) is developing the title. The Kingdom Hearts series has dabbled with virtual card-battling systems before in Kingdom Hearts: Chain of Memories, and it's PlayStation 2 remake. It also had a short-lived (at least on our shores) collectible card game.