Completed the game just now and dang. I really liked it. The setting looks beautiful, the voice acting and performances are perfect. The story is very simple but strong, nothing that would require a 2 hour explanation video to understand the ending.
Gameplay wise it is very straight forward and the difficulty is quite forgiving.
And finally the length is perfect. It feels really refreshing to have a game which is a solid 10-15 hours long.
My only small criticism is about the looting mechanic. It is not at all necessary to do so. And if you did there is not much of a pay off. I completed the game with the one knife that I bought and whatever weapons I picked up from enemies.
Overall for me it was solid overall, and I personally feel it was a hidden gem because I had no hype for this game and bought it just because it was on sale on GMG.
I will give Mafia The Old Country 8.5 out of 10.