OK, I have several games that require steam to play. I almost always play in offline mode. Today I permitted steam to update two games. (I have auto update OFF to protect Skyrim from an update screwing up SKSE, etc.) I was able to play all the games updated except for CIV5. It won't let me play Civ5 in offline mode. I keep getting a dialog box that says the 'steam serves are too busy,' and an "error code (53).' I retried about 15 times.
Might someone experienced with steam advise me on whats up, and what to do? Thank you all.
Successfully addressed. Thank you both!