The best part about Gameloft games is that sooner or later you'll find something on sale. I have 5 games on my iPad, and I got them all for 99 cents each (normally 6.99, including Starfront). I have 23 of their games on my Android phone, which I obtained over the course of a year, and I spent $17 total. They frequently have BOGO deals on Android (I regularly see similar sales for iOS), and sometimes give them away for free around the holidays. The best way to keep track of what's going on sale is to follow their various feeds on Twitter. The sales are really frequent, so I normally don't have to wait very long.