No, you can only play singleplayer.
Chat with our AI personalities
There is no campaign for multiplayer. There is multiplayer which has no storyline, there is special ops where you can do co-op to do either a kind of campaign with a storyline with a friend or do survival mode to survive as many times as possible, or there is campaign mode, which is a single-player storyline.
As of July 2014, it does not exist for the PC as a multiplayer mode.
sorry you cannot get creative mode on minecraft demo only on the paid version
No, multiplayer has no effect on your already existing single player worlds.
You have to get three pineapples in a row on classic mode ( not zen mode arcade mode or multiplayer )