I've already submitted a ticket with Steam but figured I'd ask for help here as well. I bought Total War Medieval II Gold on May 17th through Steam and it worked just fine. Two weeks or so later I downloaded the Stainless Steel mod and after some finagling and renaming it and putting it in another folder I got it to work just fine. Since then I've probably put close to three hundred hours in the game with nary a hiccup. Yesterday I decided to go back and play Kingdoms' Britannia Campaign instead of SS. I worked just fine. This afternoon I booted steam up and Kingdoms isn't in my library. Medieval II vanilla is still there and playable but none of the Campaigns or SS will open. I've searched through my hard drive and it's as if Kingdoms.exe was deleted. Like I've said I've submitted a ticket to Steam but I was curious to see if anyone had a fix or know what the hell happened.