How could time travel look inside a computer? The initial state at time T is recorded. After T+1 the delta between T and T+1 is stored. This continues for every (T+N, T+N+1) pair. A recording of state X, is the process of saving all the information contained in X. Calculating the delta between two state recordings is straightforward. The video game state consists of bits in RAM. RAM is manipulated after every clock cycle. The delta is simply the difference between the bits of two states. The ...