Hey there. I play Subterfuge with my iPhone 4 with the latest OS (iOS 7.1.2). The game (obviously) lags and occasionally crashes, but I don't really mind and don't feel the need to share this experience to others. But, after all the updates (and a traumatizing past event on a previous game), I must ask this question: Will the iPhone 4 stay compatible after the launch version?
I don't know about the others, but I noticed that my game is lagging much more often and more severe after all the updates. From my experience, most of the lag is caused by typing using the keyboard in the communication menu.