The Hong Kong Massacre

Great gameplay and visual effects during chaotic gun fights! Now that it has been patched all achievements can be obtained 👍.

Final boss is bugged killed him 4 times and still wouldn't play the cutscene

It's cool, but much harder than Hotline Miami. There's no target-lock, and there's so many bright particle effects and also areas with bright lights (which there is no option to dim) it's hard to tell if a bullet is coming at you. You also have way more enemies to kill before each checkpoint (even in the 3rd level there's like 15 to 20 guys to kill in one life), less useful cover and a hard time telling what is cover and what isn't, no way to scroll the screen a bit (there's just red arrows to indicate enemy presence, but if you can't see if they're behind cover you don't know how to enter the room). Enemies also instantly sense you once you have line of sight of them, even if they have their back turned and are in a different room. The only way to get a drop on enemies is the dodge and slow-mo. It's cool someone decided to make a prettier Hotline Miami, but why did they think it had to be much harder too? The cheap needless deaths get annoying.

Keep killing final boss and nothing happens just him spinning on the floor?

Slower gameplay than Hotline, but still fun. You can't beat that price. EDIT: Less precise than hotline leading to cheaper deaths. Still fun though.