Is there any thread or website as described in the title? Since games like Quake and Half-Life download any new content when you connect to a server (skins, maps, etc) and save them to your hard drive, I'm guessing there's a lot of content spread out across various computers, some of which might not even be available elsewhere anymore. Thought about this after seeing someone's tweets about going through their old hard drive and looking at the various Quake skins people used.