Kantor on 03 October 2008
My PS3 is usually completely silent but occasionally the fan seems to get incredibly loud. This only happens during Battlefield: Bad Company, for some odd reason, and since I finished it, I don't play it any more. Sure enough the PS3 stopped complaining.
Do you happen to have Bad Company in there?
(Former) Lead Moderator and (Eternal) VGC Detective 
