yeah, the whole game is based on a single player mode.
Actually there is also a MP mode, but IMO not as enjoyable as the SP, probably because what makes the game interesting above all is the storyline and how your charachter fits in.
On the other hand I must admit that the MP gameplay is very good thanks to the melee actions and the slow motion feature: in fact altough the great variety of weapons, a great number of 1 vs 1 actions concluded in punches and - most of all - rounded/sliding kicks in mid air, right before watching the enemy (or you in the other case) flying back with a very cinematic effect and falling to the ground. In any case, all these kung-fu styled actions blends nicely with the military/elite force characteristics of the soldiers, and nothing seem out of place.
More info for this specific topic
www.eurogamer.net/articles/news190105fearmultiplayer
Cheers, S@