Strange problem, now game won't start

[Thalassicus]

I was playing the game when suddenly some problem occured with Civ 5's graphics - everything started flickering. I exited the game, and when I restarted, Steam downloaded some files. It then did nothing. Clicking the icon to start Civ 5 doesn't work. I tried starting through the Steam library. It first says:

Completing installation - 0%

then...

"The Steam servers are too busy to handle your request for Civilization 5 (error code 2)"

I attempted:

1. Start a different game through steam - the others work.
2. Started ModBuddy, which works.
3. Restarted my computer.
4. Verified the game.
5. Changed steam download region.
6. Deleted steam's clientregistry.blob.
7. Started Civ 5 with steam in offline mode - returned error code 3.
8. Did lots of searching on Google and steam forums. Most information I found was for Error Code 53, not Error Code 2 or 3. I tried some suggestions for code 53 anyway, without success.

 

[Thalassicus]

I read it might help to wait a few hours to see if it's some steam maintenance issue that gets resolved later. Unfortunately, two hours have passed and I still cannot access the game.

 

[Thalassicus]

I uninstalled and reinstalled the game through steam, and now it works again. It's strange verification did not work.