I have logged onto PSN on my computer a few times and it only shows a few of the games that I have played. The tropheys are missing and the played games are missing too. I have played modern warfare 3 and Battlefield 3 for many hours and have many achievements that are lost. Please let me know what I may be doing wrong or what I can do to fix it.
Not all games with trophies will appear in your playstation.com PSN profile. It depends on whether or not the publisher bothered to give the appropriate data to the web site admins. MW3 and BF3 should be there though. You probably need to synchronize your trophy collection with the PSN servers (I assume that you are not a Playstation Plus subscriber). Open the option menu (triangle button) on the Trophy Collection icon, and select the Sync with Server command.