Insurgency Sandstorm is probably my 2nd favorite game that I own on my personal computer. It has extremely realistic game play and is easy to grasp, especially for newbies. The game is almost perfect with the exception of the "sniper class" which has limited areas of use considering the players can not really use the terrain to their advantage. The best way to fix this problem would be to add certain advantage points throughout the map for both teams. These advantage points can be used by the sniper in order to give their teammates a proper heads up on incoming counter attacks or super sexy ninja babes.
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