Touch Arcade: Lost Cities [$3.99] is a game that's hard to quantify. It's built on Reiner Knizia's formidable game design talents, and made into an impressive asynchronous experience by The Coding Monkeys, developers of board game delight Carcassonne [$9.99]. It has a robust single-player campaign and most of the online tools one could hope for. It looks great, too. All of that sounds pretty glowing, but we're only a few days in and I'm already making excuses not to take my turns.

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