The game is great, but i can't beat the game on elite or complete the hostile arena challenge successfully because it starts lagging whenever i'm peaking out of cover. This is a big problem with the last mission and with the hostile arena, because when the enemies come out and i move the cursor to aim at them, it wouldn't go there immediately, so then the enemy would go back into cover. Then when i shoot, it ends up shooting more than i want it to. Any suggestions to fix this? >_<