The games servers were taken down at different times across all platforms. The iOS/Android global versions shut down date is listed for offline date.

"Choose your Arthur and embark on the quest to collect rare cards and grow stronger in battle. Explore the lands and defeat bosses to obtain cards and tickets which may yield rarer cards. Strengthen your deck by leveling up your cards, or even combining cards to trigger an evolution. Combining two similar cards also activates a Limit Break which increases the card's max level, making it more powerful.

Build up your deck and battle bosses and fellow Arthurs to be the King of them all!"