Computer requirements change a lot on games now a days. One game I built my present system for updated even the processor I had just bought for my system for that game not even 2 years after we built this. Don't even get me started on Video cards. Sure you could still play these games but the quality went down the drain and keep in mind I am talking desktop gaming machines - not laptop or midline but big dollar equipment. Game companies do it all the time - and they often do so without warning and do absolutely nothing to keep you playing.