yesterday i was flooded by people who thought that their account was hacked and they lost there tf2/css. I can relax those guys, because its only a server crash. yesterday the valve server in seatle crashed and caused this problem. what is happing? steam is a big gamingplatform that interact constantly with a server. If the server cant find any connection the the valves masterserver you get a massage ingame and disconnect. So basicly you have a connection to lethal-zone game servers and the valve masterserver. To make this post not as long, your account information is standing on a server. Everytime you startup your steam your pc will connect to a server an get information what game you own. If, for some reasons, those server crashed you will get a message that you don't own a game. Can i monitor such events? You can check the stats of the valve server by visiting the following link: http://store.steampowered.com/stats/ here you can see the big hick yesterday (2 times). This event is happing on a regular base (because its really hard to keep those server up and running for years without crashes). this is the whole story nowwww start playing again you bitches!