Steam Amnesia fails to start, despite working previously.

[xkitsuna]

I've been playing Amnesia: The Dark Descent for a few days now. Up until a few hours ago, however, it worked perfectly fine.

I was going to play the game for a friend over Livestream, using Procaster. Managed to start up the game to the profile select screen--and then it crashes. I tried it two more times with a few different approaches, but apparently the two programs simply did not like each other. After that, I gave up Livestream and decided to play the game without it. It got to the launcher, I pressed start game, and then the power went out due to a storm that snuck up on us.

Anyway, a few hours later I start my computer back up and attempted to play Amnesia. The usual pop-up that says Steam is preparing to launch the game appears, disappears shortly after, and then... nothing. Absolutely nothing. The launcher doesn't even appear.

I search around for ideas on what could be the matter--the Troubleshoot Guide, mainly, but I didn't understand what I can do from that. I verified the game files over Steam, but... the game still did not want to work.

Any ideas on what the problem may be? Did I miss something? ;_; I really love this game and cannot believe its not working anymore.

Edit: I also uninstalled and reinstalled the game.