Faced a weird bug on Steam for Linux(Ubuntu 14.04 LTS). I was playing matchmaking and CSGO and the game was somewhat lagging(network issue) so I thought I'd disconenct and reconnect to fix it.
I disconnected and the whole game froze, couldn't move mouse etc. Alt+Tab didn't help much too. I tried starting terminal etc and didn't work. I directly turned off the power(using a Laptop btw) and after the next boot when I ran steam, all my games were gone. There were only "Install" buttons. On checking the directories, thier files were gone too. Oh well