For those who don't know what it is, Steam is a platform for game distribution, update, and most importantly, Digital Rights Management (DRM).
Now I'm not normally a fan of shooters, at all, but I bought the Orange Box for PC. I mainly got it for Portal. I played and completed the game without much incident. So, considering I had these other games I could play, I decided to try them out. I began to enjoy playing Half-Life 2. However, it's been a massive pain in my ass. Every other day, it says "The game is currently unavailable." I've run the gambit of fixes, and yet it keeps returning. Now, it just no longer plays at all.
Oddly enough, this is an OFFLINE game...
I've put in a ticket to their support team, demanding a fix or a refund.