Ok, I've added hints in the Guides section for those!
and thanks for playing!

Thkks
But i can still get Sleeping with the Fishes

I need to double-check this, but it may require...
Spoilers below!
Ruining your marriage in every way possible. Joe lies to Christine and has sex with someone else. Christine has sex with someone else. Talk to Detective Grassi and hear him say Joe had an affair. Don't ask Bee about the affair. At the end, Christine should have the option to shoot Joe.

ok. Thnks. I try it.

In Cold Blood - in spolers - Who i can kill? Bee and Golde i can kill or not?!

Ah, I didn't word those hints quite right. I updated it. Here's the direct answer to your question:
No, you can't kill Bee or Goldie.
and:
Here's your hit list: Gas Pipe, Hank, Bumpy, Mason the Guard, Mickey, Chicago (aka Mickey's bodyguard), Detective Grassi, and Joe.

How to Run achievement "In Cold Blood" to kill Hank and Bumpy?

Has anyone definitively figured out In Cold Blood yet? I've followed every possible combination of dropping the four that are possible, including both ways to get rid of Mickey, both shooting Grassi personally and hitting the trash can. I've even tried letting Grassi go. All of this while juggling killing only Gas Pipe and killing both Gas Pipe and CO Mason with Joe. luck.

Same problem here: I tried to get "In Cold Blood" by making the walktrough (more then 3 times, different variants) - no luck.

I just can't see when I can kill Hank or Bumpy... There's always a warden around and if I kill one of them, it means that I will miss part of the escape plan. So I just can't figure it out.

In addition, I've just completed the game for the 4th time. I tried to kill Bumpy and Hank (but finished twice at the cemetary myself) and killed everyone on the hit list: no luck. So there's definitely something I'm missing.

Same problem for In Cold Blood.

Is it necessary to try to kill Hank and Bumpy in the refectory, then later kill Mickey, Chicago, Grassi and Joe ?

At my second run, I killed these 4 there but I haven't tried to kill Hank and Bumpy at the refectory and I have not had the achievement.

Also, what about Mason ? I've never killed him, but I do not know if it's important to do it or not for the achievement.

Thanks for your answers.

Thanks, gmo!
Finally, I got the "In Cold Blood" achievement.
These were my choices:

Joe stabbed Hank, Gas Pipe and Bumpy in the mess hall.
Joe has to kill Gas Pipe (no choise).
Joe killed Mason.
Grassi killed Mickey and Chicago.
Christine killed Grassi and Joe.

Maybe, Joe doesn't have to stab Gas Pipe because he has to kill him later in the game.
But I didn't want to start all over again and you also see another possible ending.

引用自 marendil：

Thanks, gmo!
Finally, I got the "In Cold Blood" achievement.
These were my choices:

You, sir, are the man. You do indeed need to attempt the above in the mess hall to get this achievement. I just unlocked myself and finally 100% this game. Cheers.

引用自 marendil：

Thanks, gmo!
Finally, I got the "In Cold Blood" achievement.
These were my choices:
...

Thanks a lot, I have had "In Cold Blood" achievement by doing what you say.