This update optimizes the performance of the graphics engine and allows users more flexibility in setting their level of performance and graphical quality. In addition, adjustments have been made to increase AI difficulty for experienced players.
The graphics optimizations decrease overhead and provide a new feature allowing you to adjust graphic detail. Players with lower end machines will be able to set their detail level on medium or low for improved performance. The AI adjustment scales the difficulty levels better, with easy slightly easier, normal mode relatively the same, and hard mode somewhat more difficult.