I don't play a lot of games on my phone but one that I actually enjoyed quite a lot is Sorcery!. It's a very unique text-based RPG, and I was surprised to find that I liked it because I typically don't enjoy RPGs on my phone/tablet. I haven't played it in quite some time but I remember there is a branching storyline and a cool combat system which allows for a surprising amount of replayability. I think the game is being released in parts, and when I last played only the first part had been released; I'm uncertain as to whether or not purchasing the first part of the game entitles you to the rest of it for free when it is released (if it hasn't been released already). I should add that one of the most enjoyable parts of the game was the text itself, I love to read and I was very impressed with the story and all the little events that can pop up; that being said, however, if you don't like to read this app probably isn't for you.