Thanks for the advice Vandrel, I'll give that a shoot and post what happens for anyone else. (remove files and let steam update). I'm surprised no one else has had this problem, I'm just unlucky in this case I guess. I have read at least one other post online of someone hearing the same foot step error. Oh, and yeah I did not press the time compress button ;). It does happen to sound like it is in X4 time when in X1 by the sound of the footsteps, but I think that is unlikely the error. What I am experiencing at this point is that only the Pilots on the ground running are the only unit with the normal footstep sound effect, but only in single player, in multi player it sounds normal... very odd