Thread:Project:Support desk/Rolling back entire site/reply

If you are asking for a specific function in MediaWiki: I don't think so.

The easiest way would be to take a backup from before the vandalism happened and to use the database from back then.

Btw: Judging from the revisions on your main page you would have to go back until you installed the wiki to get rid of all the spam. You better start over new and invest some time to restrict editing by anonymous users. The MediaWiki installer offers you the option to do so, when you are doing the installation.