Even Hearthstone runs on Unity — and that’s why it’s already on iPad

Hearthstone: Heroes of Warcraft has been out on iPad for a week, and already it’s one of the top-downloaded apps in Apple’s App Store.

The digital collectible card battler has already impressed on PCs and Macs, becoming a new free-to-play bonanza for publisher BIizzard Entertainment, a subsidiary of Activision. And with analysts predicting that it and the publisher’s free-to-play online strategy game Heroes of the Storm could rake in up to $200 million in microtransactions this year alone, nailing the mobile port was key.