Complex sentence: Campaign-The core of the game is to be a single-player campaign utilising several game types such as city building, RPG, MMO, strategy and as social game mechanics into a hybrid in which has massively multiplayer components interlinked within those types.
Split into simpler sentences: Campaign-The core of the game is a single-player campaign. It also utilises several game types such as city building, RPG, strategy and social game mechanics, with massively multiplayer components interlinked with those types.