SvennoJ on 30 November 2014
What everyone else said.
The campaign is there to demonstrate the new things that are possible with the create tools. It's also more fun in co-op, LBP was never a great single player game. In co-op, most fun I've had with a game last gen. There are plenty community levels that are great single player challenges too.
Anyway all the LBP and LBP2 community are available to play in LBP3. You've got over 8 million levels to choose from ;)
