How many Bendy games are there? From Bendy and the ink machine/help me understand.?

Ello, I’m new to the whole bendy stuff, and I recently ordered Bendy and the ink machine game for the PS4, but I’m a bit confuse, is all the chapters in it, or do I have to buy them? 
And is Bendy and the dark revival like another game? O-0
Also how many Bendy games are there?..

2017-04-11T00:37:33.809Z