Rule number one: You need lot of patience to play this game.
The more important change in the games is the freedom of being a good cop or a bad cop and how do you get classified as a one, a bad guy may have more features (exhorting, killing criminals w/out asking, selling evidence and be richer…) but the good guy have a little more of challenge sometimes.
The city is big, but now you can drive fast through it with taxis or subways, now the houses have inners, making the city a little bigger cuz there aint a particular inner for every house.
The cars physics aren’t that good, that doesn’t meant you can’t enjoy a good drive (now you can also drive bikes).
Fighting gameplay may be good but its more push buttons than before; at least most of the fights give a challenge, gunfights have a big upgrade, kind of hard to explain but you can feel it, because now the sceneries are bigger and aren’t closed in just one place.
The music library doesn’t have any complains again.
Now the hard side, sometimes the game…
-get frame freezes
-you can’t enter doors
-totally freezes
And it hard when you haven’t saved, this forces you to save a lot… but if you learn to deal with the glitches you have a good game.